A few of my favourites are: Tommy Tiernan Dylan Moran. I highly recomend Dylans comedy series Black Books, too. Bill Hicks C'mon people, make me laugh!
Check out Chris Rock, was pretty funny back in the day i watched him on youtube. Chris Rock - Love Chris Rock - Rap Music
Frankie Boyle Jimmy Carr Andy Parsons Lee Evans Eddie Murphy Dara O'Briain Stuart Francis Russel Peters Michael McIntyre Ed Byrne Sarah Silverman Chris Rock
Man, I used to like Pablo Francisco, but he recycles so much of his stuff. I'll admit that his material is hilarious, but it's all stuff I've heard before. Props for his 'Little Tortilla Boy' piece though. That used to have me laughing so hard in middle/high school.