Carnage (Cletus Kassidy) is a fictional supervillain appearing in American comic books published by Marvel Comics, usually as an enemy of Spider-Man. He appeared for the first time in The Amazing Spider-Man #361.
You thought Venom was bad, well this symbiote with a psychotic serial killer went super-psychopath when he goes on a major killing spree. Spider-Man did have a hell of a time defeating this maniac. - TechnicallyIDoComics
2 Harley Quinn
Harley Quinn is a fictional character appearing in American comic books published by DC Comics, commonly as a sidekick of the Joker.
She was good in Suicide Squad, but by far the best version of Harley Quinn is the Batman: TAS version, always cheerful, but also a very tragic character.
Who can ignore crazy chicks when you have Harley Quinn on your lap? This girl just wanna have fun at doing bad stuffs. - TechnicallyIDoComics
"Whats that? I should kill everyone and escape? Sorry, it's the voices," that should pretty much say everything
See Bruce Timm art.
3 The Joker
The Joker is a fictional super villain created by Bill Finger, Bob Kane, and Jerry Robinson who first appeared in the debut issue of the comic book Batman (April 25, 1940) published by DC Comics. Credit for the Joker's creation is disputed; Kane and Robinson claimed responsibility for the Joker's design, ...read more.
He is the textbook definition of insanity. He kills thousands of people just for a laugh, and to break Batman psychologically
He should at LEAST be in the top 7 or something
He is unbeatable
Negan is a fictional character from the comic book series The Walking Dead and is portrayed by Jeffrey Dean Morgan in the American television series of the same name.
For the man with many F words coming out his mouth, making sex jokes and have his barb-wired baseball bat Lucille on his side, Negan doesn't keep things civilized for people and he wants everything for himself. He even swing batta swing Glenn to death with his Lucille in the comics. - TechnicallyIDoComics
5 Green Goblin
Goblin serum can mess up your mind, even the father and son of the Osborns have fallen into loose cannons after injecting the serum. - TechnicallyIDoComics
6 Hal Jordan (Parallax)
That time when Green Lantern Hal Jordan looses his damn mind after the destruction of Coast City and went nuts when he starts killing his Green Lantern Corps pals. - TechnicallyIDoComics
The last time I checked this delusional sleuth tries to get teenage superheroes killed in Avengers Arena story arc and it turned out to be the ruthless ways of survival in a place Arcade called "Murderworld". X-23 was among those teens and it didn't go well on her thanks to this Jigsaw-Willy Wonda creep. - TechnicallyIDoComics
8 The Governor
The Governor is a fictional character and a primary antagonist from the The Walking Dead comic book and television series.
Watching zombie heads in fish tanks, taking care his zombie daughter, collecting zombies, kill his own people who failed on a job and force people to fight each other surrounded by zombies for a game sport made the Governor this way. - TechnicallyIDoComics
9 Purple Man
For this deviant purple dude, he did pull the nasty score big time when he mind-controls Jessica Jones for months to do psychological awful abuse including controlling her to strip her clothes off. - TechnicallyIDoComics
10 Professor Pyg
Professor Pyg is a fictional supervillain appearing in comic books published DC Comics, commonly as an adversary of the superhero Batman.
A sick bastard wearing a pig mask who loves the cut people up and torture them, but he's no match against Batman. - TechnicallyIDoComics
Creepy little bugger, if if everyone knew who he was, he’d be number 1 for sure
11 Reverse Flash
Reverse-Flash is a name which has been used by several fictional supervillains in American comic books published by DC Comics. Each iteration is an enemy of the hero known as The Flash.
Two-Face/Harvey Dent is a fictional villain from DC Comics. Harvey Dent was one of Gotham's most trusted citizens until he had acid poured on his face making him go insane and become a criminal by the name Two-Face. In film, he has been portrayed by Billy Dee Williams in Batman, Tommy Lee Jones in Batman ...read more.
Insane lunatic who just can't stop killing girlfriends and love interests, even Elektra couldn't even defeat this guy. - TechnicallyIDoComics
Venom, or the Venom Symbiote, is an alias used by several fictional characters appearing in American comic books published by Marvel Comics, commonly in association with Spider-Man.
16 Victor Zsasz
Destroy entire Earths only to find his Earth Prime...
18 Mad Hatter
Superman is a comic character. And probably the first powerful superhero in the fictional world. The character was created by writer Jerry Siegel and artist Joe Shuster, high school students living in Cleveland, Ohio, in 1933. It was published by DC comics. The first animated superhero movie was superman. ...read more.
Superman is a crazy superhero. He wants to kill everyone he hates, even Batman. I don't like him.
The Injustice Superman was the insane one of the bunch. Read Injustice comics to find out.
20 Mr. Sinister
Sabretooth is a super villain appearing in American comic books published by Marvel Comics, most commonly in association with the X-Men, in particular as an enemy of Wolverine. Created by writer Chris Claremont and artist/co-writer John Byrne, the character first appeared in Iron Fist #14.
Catwoman is a fictional character appearing in American comic books published by DC Comics, commonly in association with the superhero Batman. ...read more.
Catwoman is very crazy. She wants to make crazy friends with everyone. She already made friend with Batman.
Ultron is a fictional supervillain appearing in American comic books published by Marvel Comics. He is most recognized as a foe of the Avengers, and has a quasi-familial relationship with several of their members, especially his creator Hank Pym.
Tries to kill the avegers
Bane is a fictional supervillain appearing in American comic books published by DC Comics, commonly as an adversary of the superhero Batman.
25 Killer Croc
Killer Croc is a fictional supervillain appearing in American comic books published by DC Comics, commonly as an adversary of the superhero Batman.
26 Bob - Batman
The Scarecrow is a fictional supervillain appearing in American comic books published by DC Comics, commonly as an adversary of the superhero Batman.
29 The Eraser
He dresses up like a pencil, need I say more
He’s a cannibal
31 Poison Ivy
Poison Ivy is a fictional supervillain appearing in American comic books published by DC Comics, commonly as an adversary of the superhero Batman.