Sabretooth and Darkseid.

Anton Arcane

Little Mike.

@joshmightbe said:

Hitler

This.

Darkseid, Antimonitor, Nekron, Mandrakk, Sinestro, Monarch, Superboy Prime, Starbreaker, Imperiex, etc. probably have all killed tons of people or planets.

@Smart_Dork_Dude: pretty much the go to answer when you're looking for worst person ever

Sabretooth. Bullseye.

Bump?

@thejokerha:

Thanks for posting that comic. See? This is why I wonder why people say that the Joker is supposed to be a force of pure evil and not really a human being. Is that some kind of something that happened in the new 52? If so, they should retcon it and bring back this idea of the Joker as some kind of madman not really responsible for his own actions or maybe a man inhabited by another personalty that makes him do really bad things. I mean, why did DC want to make this a possibly redeemable character and then change it all of a sudden? So many great stories could be written if were utilized as more than just a villain, in my opinion.

@the_soverighn: The Scarecrow

Or Anton Arcane (The Avatar of Rot)