Complete Monster/Jo Jos Bizarre Adventure


 * Dio Brando from JoJo's Bizarre Adventure, particularly in Part III. He has no compunctions forcing people to do his bidding, and even if they do that, it's no guarantee of survival (think the rich man who drives him around in Part III). His shadow also looms large over all antagonists that follow him, with all of them being connected to him in some way, and he's . Oh, and he used his stand to force someone to eat a dead cat and stab someone else in the face - and he did this just because he could.
 * Dio also makes a habit of recruiting other Complete Monsters as minions: Jack the Ripper, Gray Fly, J. Geil, Steely Dan, Alessi, Terence D'Arby (what, you thought "Bizarre" was in the title just for show?)...
 * Need we mention his manifold heinous acts in Part I? After being adopted by Jonathan's (the protagonist of Part I) father, he proceeds to make Jonathan's life a living hell for no adequate reason. He beats up Jonathan, humiliates his girlfriend, burns his dog alive, tries to poison his father, and even forfeits his humanity to become a nigh-immortal vampire. Things only get worse from here, with Dio embarking on a killing spree across London. Arguably, his single worst act in Part I is The bastard  Even though Dio had a hideously abusive father, his Freudian Excuse isn't nearly good enough to excuse his barbaric behaviour. To reiterate the above - he did this just because he could.
 * Cioccolata. OH DEAR GOD, CIOCCOLATA. For starters, his back story involves him torturing old people to death while maintaining a guise of being a good samaritan. When he starts fighting the heroes, he makes sure that he starts horribly killing the innocent people in the village just for fun. His Stand Green Day works when people are at a lower altitude than him, so what does he do? He gets on a helicopter and flies above Rome to kill as many people as possible. It says something when even the Big Bad, is disgusted by him. Thankfully, Giorno proceeds to give Cioccolata the biggest and longest beatdown in the entire series, which sends him flying into a Garbage Truck with "Combustable Trash" labeled on the back.