Kefka Palazzo
Long before Wesker developed his god complex...long before Sephiroth went batshit insane and barbecued Nibelheim...long before Dr. Doom, Magneto, Shao Kahn and Bison had set their sights on world conquest...there was Kefka.
I'll bet this guy is crazy enough to fight Galactus and Pyron at the same time. Hell, he could win every single match in Deadliest Warrior without batting an eyelash.
Kefka Palazzo is the primary antagonist and the final boss of Final Fantasy VI. Kefka acts as Emperor Gestahl's court mage early in the game, carrying out the monarch's orders. However, behind Gestahl's back, Kefka attacks various towns and drains the espers' power meant for Imperial use. This gradual culmination in power leads Kefka to overthrow Gestahl and take control of the Warring Triad, effectively becoming the God of Magic itself.
Kefka's appearance is that of an outlandish jester. In his original concept artworks, and in Dissidia Final Fantasy, Kefka wears an outfit composed of primarily red and yellow fabrics, a mismatched jumble of stripes and polka-dots. He wears a red and white striped ruffle around his neck and a red cloak with a yellow and red inner-lining. In his field sprite in Final Fantasy VI as well as alternate artworks and an alternate costume in Dissidia 012 Final Fantasy, Kefka wears green robes with gold linings and red clothing underneath. Universally, Kefka's face is covered with white make-up with red makeup around the eyes, and has white make-up on his hands. He has blond hair tied back into a tight ponytail, accentuated by an extending feather. In his "god" form, Kefka appears as a demonic angel with purple skin and a red loincloth. His limbs are far more muscular than his human form, and he bears six wings -- four light, angelic wings and two dark, bat-like wings (although the Anthologies character model for Kefka's god form seems to replace his dark bat-like wings with light angelic wings). In this form, the only notable resemblance Kefka retains to his human self is his classic ponytail, which is longer and with strands of hair flowing upwards, and the feather that also remains in his hair as a final reminder of Kefka's once-extravagant dress sense. In Dissidia, his appearance is altered slightly, with Kefka also gaining a wide grin resembling a Glasgow smile accentuated in purple lip makeup.
While previous villains in the Final Fantasy series were distant, cold, ruthless, and bent on their goals, Kefka is loud, short-tempered, maniacal, and destructive. His popularity among Final Fantasy fans as a villain is rivaled only by Sephiroth. Kefka is well-known for his many one-liners, his final appearance as an Angel of Death (which has become something of a tradition in the series), and his sociopathic hatred of virtually everything in existence. His dark humor and jester-like appearance have earned him the nickname "The Psycho Clown" among fans. Kefka's most defining character trait is arguably his laugh, a high-pitched whooping cackle that is repeated numerous times throughout the game.