Peter Kay's best joke was convincing people he could do stand up, he can't. Same goes for Gervais, his routine is so strained it's painful to watch. They are great writers though.
Ross Noble is a funny man, he's like Billy Connelly on acid. Great story telling and very clever structure to their routines despite them appearing disjointed and a bit chaotic.
A guy I used to hate that now cracks me up is Dave Letterman. OK he's not a stand up and probably has a team of writers, but his delivery is awesome.