Hmm.
Bill Hicks (went to see him live in Manchester a year before he died. Very funny man).
Mark Thomas (English radical left wing activist and stand up comic)
Eddie Izzard
The Mighty Boosh (a pair of stand up comedians who are totally bizarre. Can't recall their names to list individually) [edited to note one of them is called Noel Fielding. If anyone feels like trawling the torrents, dl some of his solo stuff it's very strange and totally charming.]
Ross Noble (Geordie comedian)
Lee and Herring (can't recall first names, do stuff together but also tour seperately, I think they may be called Stephen and Richard)
Steve Martin
Omid Djalili (Iranian comedian. Very funny).
David Mitchell and Robert Webb.
Others whose names i can't recall I'll post em as they come to mind
