Top 10 Most Powerful Fictional Characters
Ain't no way Saitama, Goku, or Superman are top 5. I'm just saying that right now. There are literal creators of the universe that cannot die and are all powerful, ALL POWERFUL. I don't people's logic when they say Saitama or Goku could beat One Above All or The Presence or Kami Tenchi. Sicne they are literal Gods, with a capital G, couldn't they literally do anything? Yea Saitama can't just punch those Gods out of existence, if you believe that, this is probably the nicest way I'll put it, you aren't exactly the sharpest tool in the shed.
Literally God of Absolutely everything, there's no beating this guy, especially in any Marvel Entertainment universe. That includes future collaborations with 3rd party characters, which are then canonically part of the Marvel Multiverse.
Yeah, there’s absolutely no question, he can do everything and anything, though it is impossible to explain because the concept of that much power will make your tiny human minds blow. We Sloths, on the other hand...
The ultimate entity controlling the entire multiverse of marvel. #1 easy. Multiverse level entities out class any lower tiers.
Sure, doing the death battle way with no power scaling would make superman the strongest, but he has not even reached his full potential yet. If he had gone to somebody like guru who could unlock that, his power would more than triple, making him the strongest. Also, it has been stated that a power level of 300 can destroy a planet, and he has enough power in him to, by my estimations, destroy several hundred BILLION planets. Sure he can't think and warp reality, but that is only because that is not how he is able to use his power. If anyone could do it just because they have power, Goku would be omnipotent. He is limitlessly strong than the world breaker hulk, as at even the beggining of dragon ball z he could destroy worlds. World breaker hulk took on the closest thing to superman there is, (and there are a lot of knock offs) the sentry, who without using his full power drew galactus to a stalemate in power, and if galactus dies, the end of the universe comes, but anyway, the sentry ...more
I could see why goku can be higher than superman. Superman is a man of steel and is certainly stronger and more durable than goku but not faster or more agile. So Goku is better than superman but by such a small amount and only when its mastered ultra instinct goku versus new 52 superman. Mastered ultra instinct goku can go 500 septillion mph, lift 8.8 billion tons, withstand 9 tredicillion tons and new 52 superman can withstand over 9 tredecillion tons, can go 92.4 quadrillion mph and lift 100 quintillion tons. Goku is able to match in skills and powers.
Son Goku is truly NOT the strongest (at least not yet), There are versions of superman which could easily annihilate Goku for example and in DC/marvel comics there are entities who could defeat Goku, HOWEVER, Son Goku is definitely one of the strongest character if you actually do genuine research and power scaling. Ignore the Saitama cucks, he's no big deal, Goku has the potential to become the strongest but that doesn't mean he will however with all my heart I hope he does. Goku is top tier but he is not there yet even though if anyone deserves to be the strongest it definitely is Son Goku, the Legend, the almighty Super Saiyan, Kakarotto.
First things first goku worked his socks off to become as strong as he is now and I don't know how all above one or super man should be compared to goku, not when they just got their strength by doing nothing, not when superman got obliterated by batman and not when we never saw all above one fight, not even once, but just believed it because the comic says so and even than if he is strong he might be the strongest in the marvel universe, but he is not from the same universe as goku. so I don't see how can all above one be compared to goku not when goku has not reached his limits. goku is the best character in my opinion but to be fair Saitama and also zeno and not forget whis and grand priest are stronger than goku but goku always has the room to grow, not like superman who doesn't even deserve to be in top 10 and an other thing some people might hate this website because it's based on public opinion but don't forget the haters "you give your opinion too which could be backed up as ...more
Okay superman is extremely strong with basically unlimited power in all
Of his stats however if you have a stronger character feel free to post here and explain why
His traveling speed is extremely high capable of much faster speeds than light speed. Unfortunately traveling speed and fighting speed are totally different. An example is superman and Wonder Woman were sparring but Wonder Woman is faster than him in fights. An example is who is faster in a fight
Bruce lee or usain bolt
He can pick up a planet just saying
Literally flew through a red star
Unfortunately superman's powers and limits are extremely controversial because of how long his character existed with multiple changes to his character and powers
So let's just say he's as strong as he needs to be when the story calls.
Who knows probably superman
Is gonna reach a whole new limit to what his power is In a few years,
Superman kinda can't die, he has other versions that cannot get affected by his weakness, kryptonite, and I think he can get affected by magic. Not sure. There's cosmic armor superman, that's the most powerful I think.
If you want Goku to be stronger then superman then you are not a true fan of goku. There storys define there power. Gokus power comes from his hard work and effort to become the very best there is and to break every limit his has and what dragon ball super has shown us is that even his god forms have limits and until he has a transformation that will make his power limitless he wont be able to beat superman. superman was born with his power and didn't really have to work for it. His DNA allows him to basically fight at what ever strength is needed for his battles it just some times takes a little for his body to relize how much he needs. An example is doomsday beats darkseid almost with not effort. But when superman is fighting both of them his effort seems the same. this is because the strength of his power is proportional. I love goku and and am a dbz freak my guy in xenoverse two was a leval 80 within a week and I watch super the second theirs a new episode. but theirs a reason ...more
I believe superman should be number 1 because every time get gets into a fight GE can't win he improves because he is of endless power on this earth yes I know that he can be affected if a red sun or kryptonite was involved but the only 2 people who would be smart enough to use that against him would be batman and led luthor and probably others who know his weakness and can obtain it
Kirby is likely the most powerful fictional character that isn't a creator of the universe or a god or deity of any type. Literally destroyed deities and planets over a piece of cake lol. Oh and did I mention he could copy powers and his mouth is literally a black hole?
Bruh. Kirby should EASILY be Number 2. He has been able to kill characters that Nintendo calls "Gods" with only inhaling attacks and his physical strength. His weapons can kill beings that are ALMOST omnipotent, and has the Warp Star. In case you don't remember, in Super Smash Bros. Ultimate, the Warp Star allowed Kirby to get to the very EDGE OF THE UNIVERSE in less than THREE MINUTES. Also, don't forget, he's defeated beings that can EASILY destroy planets, like Magolor Soul and Void Termina. And he ALSO defeated Galeem, who ONE-SHOT EVERY SINGLE SUPER SMASH BROS. ULTIMATE CHARACTER, as WELL as Dharkon. And he beat them BOTH at the SAME TIME. Also, at the end of Kirby Super Star, the text that shows says ALL IN A DAY'S WORK. That's right, Kirby took back all the food Dedede stole, defeated Dyna Blade, defeated Meta Knight, and also defeated Galactic Nova and Marx all in ONE DAY.
Kirby likes sucking people into a black hole just for a piece of cake! now that what I look for in a best friend. ANDDD he's also cute you can't take your eyes of his ocean blue eyes. And his delicate rose skin he should be in at least the top three. look at him he's more powerful than thanos! now tahst a real man
Kirby below Superman and Goku is utter crazy. Superman may be somewhat strong, but seriously? He can hit meteors thousands of light years away, survive a PLANET-SIZED EXPLOSION. Oh, can I forget about his inhale/copy abilities? And the warp star can travel over the speed of light, so..
The Presence is (yet again) a LITERAL GOD. Why are these GODS rated so low? Idiotic fans really put Superman higher than the GOD who created him. The Presence is easily stronger than Superman and Goku. The Presence is on the level of Zeno from DBS, so of course he's stronger than Goku. My GOD, just put the OP beings in the right spots. Easily No. 4 or 5.
He is completely omnipotent. He created the DC multiverse.
He can change and warp reality without so much as thought which means characters like superman, saitama, goku, or anybody else is powerless against him. Because even with all their power combined they're not infinite in every way imaginable like his is therefore he'd just wish them out of existence and "poof" their gone.
He's the person ALMOST capable of being on the level of TOAA. The only reason he's not equal to him is that he recognizes someone above him.
The Presence is the God Himself, Creator of the DC Universe. Everything that has ever happened or ever will is single-handedly determined by His thoughts and/or plans. That says it all.
Now this is just stupid. If we're talking about plain-old Thanos, MCOC Thanos, or MCU Thanos, he's powerless compared to the likes of Saitama (blegh). But if we are talking about HOTU Thanos, he's easily No. 5, excluding literal gods. If we're talking Regulator Thanos, he's No. 6 at least, including the LITERAL GODS (such as The Presence, TOAA, Kami Tenchi, Zeno and Azathoth). I've likely missed a ton but that would only either put Regulator Thanos -1 or stay the same because he's on the level of gods, as he revealed TOAA in the first place. There's no stopping Regulator Thanos. Regular Thanos on the other hand, is around the strength level of Galactus or Darkseid. MCU is around the level of Batman. MCOC is just a joke.
Thanos should be above almost everyone who isn't an Abstract/Deity, like Galactus and beings of higher nature, such as LT. After all, he's the one who is equal or superior to fully powered Phoenix Force Thane, who could bust the Universe, frighten Death herself and overpower her curse on Thanos (and possibly scales to Cyclops with PF, who managed to briefly burn God Doom; Jean Grey, who held a universe in her hands and Rachel Grey, who beat Hungry Galactus), took blasts that casually killed Celestials and Galactus to the face and was fine, and briefly survived Multiversal+ destruction. There's also a possibility that Thanos could briefly fight Regulator Thanos, who absorbed LT and a depowered AAO, and is stronger than HOTU Thanos, who is linked to the omniverse. These versions of Thanos would easily be on Top 5. Back on Base Thanos, I'm not even counting on his hax and extreme resistance to hax, like permakill, immortality, Hyperversal telepathy, energy/matter manipulation, force ...more
There Ten Reasons why Thanos is Ranked Below Bill
1. Infinity Gauntlet wouldn’t work outside of the marvel universe
2. Thanos can use the Mind and Time Space Gem to break Reality
3. Infinity Gauntlet can only Work with prep time
4. Thanos can’t Mind of someone
5. Bill can One Shot Thanos
6. Thanos One Shot Galactus without the Gauntlet or the Infinity Gems
7. Bill knows Lots of Things and Everything’s
8. With The Heart of the Universe Thanos can Destroy things
9.If Thanos was Bloodlust he will ranked higher but he will be ranked to 12
10. infinity Gauntlet Snap would never Work on the Mavel Universe
He has the most powerful weapon I.e.The Infinity Gauntlet, which can wipe out half of the population of the universe with a single snap.
So he is the most powerful character
Come on dude
Bill Cipher could defeat anyone in existence just by blasting them to dust whenever he feels like it after he made them trust him. He has every power that I could think of and he can create life so why not just create someone stronger than the person he’s fighting and then kill the thing he created.
He literally leveled Gravity Falls to nothing but weirdness in just a few minutes. He could defeat everyone and he can haunt people’s dreams so hard that they go insane them Bill Cipher blasts them to dust.
He can beat anyone on this list and could blow up entire universes and seconds. Plus that voice is sooo amazing.
Honestly everyone else on this list stands zero chance against bill. He has been shown to bend time and space around him and exists in the fourth dimension which means it takes at least another fourth dimensional reality warper or even a fifth dimensional one to even stand a remote chance against this guy. Even still he has the capability of wiping out entire universes, timelines and other dimensions which means he could wipe out anyone in his path.
Goku? Superman? Saitama? Galactus? Silver surfer? MLG SHREK!?! WHAT?!
Bill is easily the number one strongest charecter in fiction
I have to say hardly ANYONE is stronger than Bill!
I mean I might not be a Gravity Falls fan (one of my friends is the biggest one ever though) although I have seen a couple of episodes (thanks to my friend) and I will definitely will say he's probably like as powerful as it gets! I mean he has all the power Thanos has (with the gauntlet) but unlike Thanos he can't be killed by any weapon or even destroyed by someone like Beerus when he uses his mind, however he could still be destroyed by one of his destructo blasts. (My sis is a huge fan of Beerus). Considering he's basically invincible and immortal and he can't be absorbed (so that makes him stronger than kirby) and considering also that he can control reality, time, space, matter, the soul, and the mind he definitely deserves to be higher than 7. So I basically I would say he's the strongest there is but there still are people who could definitely could beat him though such as Eddie the Head (that guy rocks! ), Beerus (if he ...more
I was just waiting to see Bill on this list. He has so much power. Enough power to burn down the second dimension! Enough power to do whatever he wants. He probably knew that he’d lose Weirdmageddon. He’s a time traveler, and he had forever to redo it, but it was all a game to him.
While the one person on here said it's ridiculous to treat him as an unstoppable being just because of one scene and considering him OP would be out of his character, it still just wasn't enough to stop him from being all the way at 8th place! XD
To say that the ultimate force that is Shaggy Rogers is the most powerful being in the entirety of existence would be an understatement. A lot of people would probably say that Thanos is more powerful, but while Thanos could only destroy half of all living things in the universe with the infinity stones. Shaggy could snap his fingers and destroy every conceivable universe and timeline and still not be at his maximum power.
I'd go far as to say that not only did he create the world we're standing on, but he likely even created each universe.
Before there was existence, there was Shaggy Rogers.
This glorification honestly needs to end. Sure Shaggy was a badass in that one scene in a Scooby-Doo film, Heck the Ultra Instinct edit was funny and well made. Now, this crap fest of a meme has people proclaim Shaggy supposedly use "0.1%" of his power comes right out of nowhere and instantly assume him to be up among the likes of Goku, Superman, Darkseid, Thanos and more. I'm sorry but, how is this funny? There's no substance to this joke. Aside from that one scene, Shaggy isn't this "Unstoppable God" that this meme has made him out to be and it directly goes against his character at the same time too. Not to mention Shaggy's feats are entirely made up by fans whereas the accomplishments done by characters like Superman (Who can sneeze a galaxy away) and Darkseid (Who can destroy the entire multiverse by simply existing outside Fourth World) are Canon.
Also, meme characters have NO reason to be on this list. Shaggy had a funny meme for a certain amount of time, but at this ...more
Now I don't know where the shaggy being op meme came from but I am not a fan of it but logically speaking he has delt with tons of deadly and paranormal things so
Batman is number one. He killed the ultimate evil and the entire justice league!
So are you saying that batman is tougher than the one above all, the god?
HaHaHaHa. You guys are so funny. Hercules could defeat Batman in one punch.
Batman beats super man so, arguably number 2
The Living Tribunal is explicitly stronger than Silver Surfer and The Hulk in-universe, so I'm not really sure why he's BELOW them on this list.
How is Goku higher than him? He is nearly omnipotent and Goku is just a dude who can summon plasma and stuff
Living Tribunal, being the Supreme being of the Multiverse and being second only to TOAA is enough to put him in the list.
Also Kirby is only Multi Solar-System, get him out of this.
Saitama is a joke. He's OP for the memes, but turns out he isn't actually OP. He's top 10 excluding the literal gods, but definitely isn't on the level of Regulator Thanos. He might beat Superman and Goku, but he isn't actually really that fast. He's only human after all, and he took multiple punches to beat Boros, who superman could probably obliterate him. Goku when he masters ultra instinct will just evade every one of Saitama's attacks. Saitama has no other utility other than speed and power. Overrated.
Saitama obviously should come after One Above All in second place. He can end anything in just ONE punch and practically doesn't get hurt.
Saitama should at least be in the top 10 instead of Goku or Batman or Superman he can wreck them all in just 1 punch, he should so be in the top 10.
The entire *point* of Saitama is that he is infinitely powerful, so much so that he actually begins to hate it: no villain is a challenge for him, almost no monster survives more than a single punch from him... Even the mostly godly foe just bores him. In his final fight of season one, no matter how obscenely powerful his alien opponent is, it's clear that Saitama is never in any actual danger, that he never loses control of the situation. In fiction there is no superhero more powerful than he is, and that's his weakness. I'm sure every character on this list would rather be in the #1 spot than Saitama.
Galactus could beat superman. He can absorb matter and energy so he could do that to his enemies. He could get too big tofight.
Galactus is easily a universe buster with multiuniversal feats,as seen in the Black Celestial Arc,his fight with Scrier and The Other,him being superior to Kosmos,oneshotting a Celestial(he was overfed,but still),almost destroying the universe when weakened,etc.He's not the strongest here,but he deserves some respect.Goku being above him and staying top 2 makes no sense.
He probably ate the moon and pooped out the more crappier version LOL
Worlds are certainly fun to destroy, but to eat?
God of Apokilips. Lord of Tyranny. Darkseid Is.
Darkseid's Omega Effect is more than enough to have him on the top ten. However, he's also very smart and is an experienced fighter in his own right. His fears are ridiculous and can match up to godlike figures like Superman and Orion (his son) who are themselves some of the strongest heroes in DC. His true form resides in Fourth World and his strength there is at his greatest, capable of overwhelming most godlike beings without much of an issue, and his true form is so malevolent, simply exiting Forth World would destroy the entire multiverse. This is why he creates avatars to interact with the universe, and even then, they are incredibly powerful in their own right.
Ok, this guy is the real deal. His Omega Beams can obliterate anyone that's in the DC Universe, with the exception of Superman, Doomsday, and Galactus. Even though he might look like a rock in a suit, he defeated many powerful people, including The Time Trapper. This guy also has A WHOLE ENTIRE PLANET AT HIS CONTROL. That's basically fighting about 10 Billion people plus an extremely overpowered man, or woman. I don't know what this thing's gender is, but boy, is he a big threat. (Information from Wikipedia)
Darkseid Has many times proven to take on the entire justice league and barely loose. HE is indeed much stronger than superman and I therefore argue him at about the same level as beerus with the anti life codex.
His body contains so much energy that if it went to the DC Universe, it would tear apart existence. So Thanos CAN'T beat him and everyone but Superman would get one-shot by his Omega Beam
Vegeta will always be strong enought to be a bit weaker than the strongest enemy. He also will always be there to make Goku look good.
44? The sole character to go pound for pound on pat with Goku and even surpass him up until the final tournament arc is 44? Bullcrap list.
If he is on equal footing with that clown, Kakarot, how can he be all the way down here at 9?! This is an insult for the Prince of all Saiyans!
Hey whoever did dis research and made vegeta no.18 so go check well bcaus vegeta is de most powerful anime character
Godzilla should definitely bee in top ten I don't get how he's number 15. Bill Cipher might have him beat scratch might he definitely has him beat but Godzilla at least deserves 10. I mean give the dude some credit!
It Honestly Depends Which Version Of Godzilla. Earth and Shin are literal gods, Showa and Heisei are powerful enough, Final Goji murdered like 8 kaiju in a row so...
Also not counting King Godzilla or God Godzilla from the Manga, they are also gods incarnate like Earth and Shin
Godzilla! The king of monsters. If we go with any Godzilla he is very powerful, yes even marvel Godzilla, I guess. If we composite him that’s just insane. He will alway be king of the monsters, even if Kong beats him and I swear if he does I have lost faith in humanity, c’mon now.
Undoubtably the strongest fictional character if you ask me, especially when in he's Keizer Godzilla, what is Keizer Godzilla you ask? Oh, just Final Wars Godzilla (who is already the strongest Godzilla) with INFINITE POWER, so yeah, Keizer Godzilla is the strongest fictional character, no contest, he obliterates anyone he fights in a single hit.
"One can never have too many socks."
-Albus Dumbledore, First Book
He can take control of peoples bodies
If you kill him you are an homofobe, therefore he's unbeatable.
I am obsessed with harry potter
Thor is incredibly powerful and he was the reason the Avengers weren't completely destroyed on Wakanda and got close to defeating Thanos but at that point Thanos was already way too powerful. And to wield Stormbreaker you have to be extremely powerful, any normal person to wield it would disintegrate. He also escaped from Surtur and defeated him in combat.
God of thunder I wish he was my husband
He is stronger than superman.
What how is he above vegeta.
He's an omnipotent God, he can just think of something then it will happen
Most powerful anime character ever, even surpaces the one above all
I know I barlet know anything about this guy I think he's genderless but he's omnipotent
Nothing can kill him,he completely unkillable he should be on top 1
Doomsday is without a doubt one of the most underrated characters ever. He's often overlooked although he is one of the most powerful beings in the DC universe, up there with or maybe even over Superman (no matter what version). He killed Superman and he's immortal in a way. If he gets killed by someone, he gets revived and becomes sort of immune to who or what killed him. So yea unless you are an all powerful god, a 6th dimensional imp, 12th level intellect, or Kirby, you got no chance of actually permanently defeating Doomsday.
Doomsday deserves to be higher on this list. Definitely more powerful than most versions of Batman at least.
He becomes immune to whatever kills him so eventually could theoretically beat any character unless they could contain him
Would anybody like to explain to me why The goddamned Doctor is above Doomsday? The being so strong that he literally cannot permanently die? He could destroy everybody on this list, if not the first try, then the second.
I know he killed the man of steal why’s he so low plus he looks so cool and when he dies he gets up and gets stronger he should be at least number 1 or 2 like super man got killed by this guy does anybody know that?
Just as powerful as spongebob, he cut the intire state of Florida in less than 5 seconds, he can also become the animator and animate the world around him. So yeah, goku hold bugs carrots.
Cartoon characters are protected by Toon Force and Bugs has the strongest form of it. No matter what happens to him, he'll always comes back from it because he's protected by the Rule of Funny.
In other words, nothing can really happen to him unless it's funny, and no permanent damage can be done to him because it wouldn't be funny if he died. So Bugs Bunny should top this list every time.
Bugs Bunny is at god level. He has the highest level toon power and is multi universal (has been in the real world and crossed over with fictional universes), he can literally erase you with a giant pencil. He can re-write your entire existence. He has defeated actual deities.
How could one dum bunny, bugs bunny be more powerful than Iorn Man, Wolverine, Doctor Strange, Flash, Durmammu, Captain America, and so much more.
Keaton's is marked 25? Are you phucking kidding me? I mean, I know he is no where near Doomsday status, but seriously? He has killed dozens of giants, which are considered to be extremely difficult to kill because of their sizes, and Gods, which are considered to be unkillable. So I think Kratos should be in Top 15 status.
In the comics, can go faster than the flash and several others with his Hermes thing
Are you kidding? Th God who has ripped apart whole Greek pantheon and is about to kill Norse Gods is ranked 24?
He kill every god in the Egyptian world he needs superman's placement
He is literally directly below or equal to the one above all pre recon
Beyonder was created as a supreme being from 'beyond' the marvel-verse.
The original beyonder would stalemate ToAA.
Excuse me!? He is the most powerful thing in marvel!
The Beyonder should be above his current ranking.
I really think Discord should be on a higher rank. I mean come on! He's a REALITY WARPER! He's basicly on almost the same level as Bill Cipher. Ok I do admit that he has a few known weaknesses, but still! *Sigh* People just underestimate him too much these days...
Impossible. Discord was only defeated by all magic and friendship magic
Wait why did I vote for this guy? He's worse than Bill. No shot.
He said it himself, he can do whatever he wants, whenever he wants. what? you honestly think that the elements could stop him? he probably created them. he treated the whole ordeal like a game. You think Tierk took his magic? his eyes never changed color. you think chrysalis throne could stop his magic? he played it slow to see what would come about. he's at least just as powerful as Bill Cipher, if not more-so.
The Hulk's power is practically unlimited. As his fury increases, he gets stronger and stronger. He takes ramp up, but can outpower Saitama and Superman. He just needs to survive long enough, and get mad enough. Not even close to top 10 though, even disregarding the gods. Actually, this list isn't about who would win in a fight, just about who is the strongest. But we all know Hulk is strongest there is (disregarding gods). He would never win a fight against anyone in top 10 unless he gets a chance to build up his rage. Then after centuries of anger, he one shots Superman and Saitama. Though gods wouldn't get hit, neither would Goku, and neither would Regulator Thanos.
Hulk is way stronger than Thor, also I know Batman did beat Hulk in a fight but if the tables were turned to say hands down muscle to muscle Hulk would obliterate Batman in seconds and if we're doing different variations I call Zombie Hulk to the stand.
Zombie Hulk ate Silver Surfer and Galactus with the aid of other infected supers and gained the power "Cosmic" with almost nigh omnipotence in power so with that power he'd be at least number five, With Goku, Saitama, Superman and One Above All ahead of him in that order.
Thank you for reading my opinion and validating it good day.
Dude he can't die! Bullets won't kill him, bombs won't kill him, even being flung to space to another planet never killed him, there was even a war called World War Hulk (in the comics) legit this guy's the strongest! Even when his Bruce Banner side dies, his hulk side remains alive forever. He's indestructible AND immortal.
Hulk is Indestructible and he has limitless Strength plus He can go faster than the Flash and Superman if he's Angry enough and lets not even get started on world Breaker Hulk which increase's his Strength to Infinite level's.
It is specifically stated by a GOD that Zen-chan can never be defeated. It does not matter at all who has what feats, as first of all Zeno has effortlessly surpassed feats of complete omnipotents (one above all, beyonder, living tribunal, the source Kami Tenchi) and has never even been challenged and has greater potential to be a great fighter with his infinite strength even without training, and two, is stated that it is not possible to defeat him. Also, obviously zalama, a dragon god the size of a universe, is not as strong as him. Let me explain. Zamasu wished on the super dragon balls to be immortal, and that immortality granted by zalama was overridden by Zeno.
The One being who is the Supreme Ruler of 12 ( formerly 18, as he destroyed 6 universes just because his mood was a bit SPOILED ) amd can destroy anything he wants with a blink of an eye is indeed the strongest...while some characters possess strength to destroy an entire universe, he has already destroyed "6" universes
A being to whom even the GODS bow. THANOS needed the IG to destroy half of the Universe while he has already destroyed 6 universes...something nobody can even think about Boasting.
The only thing that makes the omni-king super OP is that he can use the erase ability, and ability that can kill immortal and mortal beings alike.