Luthor,Sinestro,Bane,Black Adam,The Rogues.
Venom,Magneto and Dr Doom.
I say this cause we've seen these guys as being depicted somewhat heroic. BTW who in their right minds think Scarecrow,Manta,Freeze,Zoom and Zsasz? would make good heroes?
I think Absorbing Man could be a pretty cool hero. That seems like a power set you could do a lot with creatively. Also he always struck me as a laid back kind of guy which I can relate to in a weird way. After a hard day's work just kick back and have a beer or something.
The answer is probably all of them except for the Joker, & none if them. The thing about a villain is that their origin & motivation should be written the same way as a hero would be, but they just give in to the dark side. Breaking bad is a good example. I think. I've only seen the first 7 episodes, & I'm never going to watch it. But he wants to make money for his family when he dies. The system is broken, medication is too expensive, a qualified teacher should have their health-care provided, we get into the whole reason why some people actually need something that Obama-care should provide, but doesnt, because its evil created by evil-scum, so he has to turn bad. Then he just goes evil I guess.
Compared to Dexter who kills killers. He is basicly the Punisher, who both in theory are what the world needs because they break the laws & rules that prevent cops from doing their job of Protect & service the innocent.
In fact, thats one thing I dislike about GTA5. The 3 guys are villains, but its ok to kill the cops & other authorities because they are all even more evil & corrupt that you 3 are. So its trying to justifiy why its ok to kill the cops as compared to how Matrix never really tried to justifiy how Neo & Trinity just shot up a bunch of innocent cops. Because media violence.
However, just because anti-Heros work, does NOT mean we should have these anti-villains. Villains should never be shown in a positive light.