[The Joker]

The Joker for every single category. His motivation, characterization, and impact were all better than Bane's.

As for skill, Joker climbed up from being a common bank robber to the top man in Gotham's underworld, he destroyed Harvey Dent, he killed Rachel, turned Gotham into chaos, and he turned all of Gotham against Batman. He did all of that without inheriting a global organization like the LOS and it's resources and knowledge.