Top 10 Best Bleach Villains

Ulquiorra Cifer

Ulquiorra Cifer is a fictional character in the Bleach manga series and its adaptations, created by Tite Kubo. He is the 4th Espada in the army of Sōsuke Aizen. Ulquiorra is known for his emotionless demeanor and powerful abilities.

Well, Aizen and Yhwach both had their moments, but they didn't develop as characters at all. That's why Ulquiorra gets my vote.
"I see now... in the palm of my hand... was her heart."

L died by the hands of a teenage kid with orangey hair (side glance at Light).
And so after he died, he decided to crash another universe and then met the same fate.

Sōsuke Aizen

Sosuke Aizen is a fictional character in the Bleach manga series and its adaptations, created by Tite Kubo. He is a former captain of the 5th Division in the Gotei 13 and serves as one of the series' primary antagonists. Aizen is known for his intelligence, manipulation, and powerful abilities.

Aizen was the Captain of Squad 5, who is now the leader of all Arrancars. He made himself look so innocent. When I thought he was dead, he came back and injured Momo. He even faked his own death and made it look realistic, fooling everyone.
After he got the Hogyoku, he literally became immortal and left the Soul Society in chaos with two other squad captains.

Considering that he never used Bankai, he is insanely powerful, and his perfect hypnosis is a borderline broken ability to have.

Brilliant. Absolutely brilliant. In more ways than one. How many readers (or watchers) of Bleach saw his betrayal coming with no beforehand spoilers? One, maybe two?
Although his background wasn't as expanded upon as Ulquiorra's or Grimmjow's, that was part of the beauty of his character. Ichigo could feel Aizen's loneliness through his sword, but the rest was pure speculation. The loneliness could have meant a multitude of things, and so all you can confirm about Aizen's past is that he was lonely.
When you look back, it certainly seems that way. In his final Hogyoku fusion form, he had three hollow holes. One held a material that could transform him into a transcendent being at the cost of his human features (as human as a Shinigami can get). Thus, there was no saving grace for him from that point on - he was too far gone.
And yet, when he fought alongside Ichigo against Yhwach, would that not mean he finally achieved his goal - to not be lonely? He fought alone for so long. He single-handedly defeated most of the Gotei-13 but on his own. Gin was never truly on his side. Tousen was a pawn. He could never fight in tandem with someone on equal grounds, but there he was, having (almost) defeated a godly being not on his own, but with Kurosaki Ichigo.
It's these kinds of things that make Kubo such an amazing writer. Filling in the gaps of Aizen's backstory with a few simple words and then resolving it without ever having to fully expand on it. Props to you, Kubo. And props to anyone who read all of this.

Grimmjow Jaegerjaquez

Grimmjow Jaegerjaquez is a fictional character in the Bleach manga series and its adaptations created by Tite Kubo.

Grimmjow is one of the major antagonists in Bleach, ranked as the 6th Espada. The Espada are an elite group of Arrancar - Hollows who evolved by removing their masks and gaining... read more

Yhwach

This guy made Aizen look like a kid. He even destroyed the Soul Society and outclassed the 13 Court Guard Squads in a way Aizen couldn't match. He's also a Quincy, and he's been masquerading as Zangetsu this whole time? Now that's the meaning of bad. He even tried to use Aizen! Pure evil!

This guy single-handedly defeated Genryūsai Shigekuni Yamamoto, which speaks volumes of his strength. The commander had said that there has been no Shinigami who has even matched him, let alone defeated him, in battle for more than a millennium.
So, unarguably, Yhwach has to be the strongest villain.

Gin Ichimaru

Gin Ichimaru is a fictional character in the Bleach manga series and its adaptations, created by Tite Kubo. He is a former captain of the 3rd Division in the Gotei 13 and is known for his constant sly smile and mysterious demeanor. Gin plays a major role in the Arrancar arc and has a complex relationship... read more

Kaname Tōsen

While his characterization ultimately became somewhat confusing, he is one of the most sympathetic and rounded villains in Bleach. His connection with Komamura and Hisagi made his final chapters the best part of the Aizen arc due to their emotional and frightening effect.
Also, it's just cool to have a blind villain.

Shūkurō Tsukishima

This guy was on a whole new level. He could rival Gin and Aizen in trolling.

Coyote Starrk

Coyote Starrk is a fictional character in the Bleach manga series and its adaptations, created by Tite Kubo. He is an Arrancar and serves as the Primera Espada in Sosuke Aizen's army. Starrk is known for his calm personality and immense strength in battle, as well as his ability to summon his partner... read more

Starrk needs to be higher! I mean, come on, he doesn't even try!

Most laid-back, relatable villain in Bleach!

Nnoitra Gilga

Grand Fisher

?

Zommari Rureaux

?

Szayelaporro Granz

Baraggan Louisenbairn

Byakuya Kuchiki

Byakuya Kuchiki is a fictional character in the anime and manga series Bleach, created by Tite Kubo. He is the captain of the 6th Division in the Gotei 13 and the head of the noble Kuchiki clan. Known for his calm demeanor and strong sense of duty, Byakuya is a key figure in the story, especially during... read more

Tier Harribel

Jin Kariya

Yammy Llargo

Kōkōtō

Uryū Ishida

Aaroniero Arruruerie

Kūgo Ginjō

Kenpachi Zaraki

Kenpachi Zaraki is a fictional character and an antihero in the anime and manga series Bleach, created by Tite Kubo. He is the captain of the 11th Division in the Gotei 13 and is known for his immense strength and love of combat. Kenpachi is one of the most powerful and feared Soul Reapers in the series... read more

Mabashi

Tokinada Tsunayashiro

The latest villain in the CFYOW novel, this man is responsible for most events leading up to the current plot of Bleach. His murder of his wife, revealed to be Kakyou, a good friend of Kaname Tousen, led the latter into madness, seeking revenge against the Shinigami.
He is presumably also behind the assassination plot against Kugo Ginjo's friends, leading to Ginjo's own betrayal and skepticism towards the Gotei 13. Tokinada was also confirmed to be the man behind the execution of Nanao Ise's mother, due to her husband dying from a curse of the legendary Ise family sword.
Prior to the events of Bleach, Tokinada murdered many of his family members to become Head of the Tsunayashiro clan. What exactly is the motivation behind his actions? He was skeptical and denounced the Soul King's current state of existence due to actions of the Four Great Noble Houses, also known as the Soul Society's Original Sin.
Like Aizen and Yhwach, Tokinada believed there was something wrong with the way the world currently works. With the novel's setting taking place after the war against Yhwach and the Quincies, Tokinada's intention is to use his protégé, Hikone, to replace the Soul King. Doing what Aizen failed to do, Tokinada intends to destroy Karakura Town by sapping all its spirit energy, turning it into a key to gain entry to the Soul Palace. The catch is that Ichigo Kurosaki cannot be present in Karakura Town.
Tokinada is very sadistic and nihilistic. He believes everything is fake and abuses his power as an aristocrat to negatively influence the Soul Society. After finding out about the Original Sin, Tokinada decides to be as menacingly evil as he can because "the world is fake and shall fall soon, so he can do whatever he likes."

Jugram Haschwalth

Jugram Haschwalth is a fictional character in the Bleach manga series and its adaptations, created by Tite Kubo. He serves as the right-hand man of Yhwach and is the second-in-command of the Wandenreich's Sternritter. Haschwalth is known for his abilities related to balance and for wielding immense power... read more

Basically, evil Uryu, aside from the currently evil Uryu. But, yeah.