Deathstroke! Or William Hand.
The Joker all the way. Chaos and mayhem just for the sake of it, a disregard for pretty much all life, and unspeakable cruelties just for fun put him far above any other villain.
The Joker, with Scarecrow or Bane at a close second!
Darkseid… Who else!?!
Sinestro… Now just give him a great hook of a story… Showing him as the forth right autocrat he knows he is…
Eclipso… We need a superhero (or supervillian) slaughterfest… Let the black diamond carnage begin!
Joker as he always will be the clown prince of crime and i like his wild green hair
Joker but damm i love deathstrokes design
Lex Luthor, Joker, Bane, Star Sapphire, Circe
Atrocitus, the Secret Six