WotE? Stone Cold Steve Austin by a very very very gigantic margin.
He has a skillset no one else really has, he's a guy people are just so nuts for and his character even if he has to go through a bunch of crap is just crazy memorable. But more importantly he's got the highest number of memorable PPV moments. The Rock I really feel like his most memorable moments are the stupid bits like WM2000 or him getting screwed by The Undertaker. Foley's had the second most highlights on PPV but he's also not been in as many great main events.
However, that being said in terms of match quality? I like non-Brawler Stone Cold's matches way more even if he wasn't nearly as over.
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Dr voltchball - best in the world.