No member of Batman's rogues' gallery rivals the Clown Prince of Crime in malevolence. The Joker has held the top spot among Batman's villains almost since the character's inception. His status is not just due to recognition; he has earned his fearsome reputation by committing heinous acts to dominate Gotham, mock Batman, or satisfy his own twisted pleasures.
Evidence of his evil can be found in acclaimed superhero movies, TV shows, and DC Comics. One of the Joker's most chilling portrayals appears in the 1988 graphic novel Batman: The Killing Joke, by writer Alan Moore and artist Brian Bolland.
"The 1988 one-shot offers insight into the Joker's tragic origins and is so disturbing that its 2016 adaptation became the first R-rated animated DC movie."
In this story, the Joker executes a horrific plan by shooting Barbara Gordon, leaving her paralyzed from the waist down. This brutal attack was intended to drive her father, Commissioner James Gordon, to madness. Though Barbara survived, she was forced to take on a new role as Batman’s remote computer operator, codenamed Oracle.
"The tragic, near-fatal act is part of Joker's plan to break Commissioner Gordon's sanity, a goal he nearly achieves."
The Joker is not just a maddening foe but a dark reflection of chaos itself, making him arguably the most sinister villain in Batman’s world.
Author’s summary: The Joker is Batman’s cruelest adversary, committing unspeakable acts to torment Gotham and its protector, solidifying his place as the ultimate villain.