The World's Meanest: The Villains of DC Comics

Lex Luthor (Lee Bermejo Tribute)

The Joker (Heath Ledger Tribute)

Cheetah

Sinestro

Reverse Flash (New 52)

Black Manta
Spacial thanks to Lukas Schneider for his valuable help providing a solid reference, for this one!

Black Adam (Dwayne Johnson)

Deathstroke