Ive never seen any of these, but I have to go for Craig Ferguson, because it never ceases to amaze me that hes a household name in the US. He was a very minor figure in the TV comedy circuit in the UK in the late 80s/early 90s, doing the usual round of improv, game shows and stand up programmes on TV. Possibly he may have been more famous in Scotland, as they have different TV to England. I always quite liked him, but as a teenage comedy nerd, i am one of the few people who know who he is.