Stewart Lee is phenomenal - he very much straddles the line between comedy and avant-garde theater, but he does things no other comic can.

Relevant to the article, he also wrote a book that deconstructs some of his routines. There are a few brilliant youtube clips somewhere, where someone has taken video of those routines and added annotations of what he said about each joke, as the joke comes up. I'd link them but I can't find the damn things.