Eddie Izzard (He's a tranvestite, but don't let that put you off, he is extremely funny and even uses his image to the advantage of a joke, such as getting beat up in Cambridge, trying to join the army etc. He's so good, I've got every show he's recorded onto DVD up until 2006 sitting on my shelf.
)
Bill Bailey (If you can pick up Part Troll, you're in for a treat)
Jimmy Carr
Jasper Carrot (I think he's classic)
Dylan Moran
Rich Hall
Jo Brand (She's kind of feminist and plays on her being fat quite a lot, but she's a good laugh)
Are all funny, I don't think Jimmy Carr is particularly funny in comparison and I've never seen any of his stand up, but he's said some pretty hilarious stuff on QI (Watch that if you're looking for something funny, especially with episodes that include, Jimmy Carr, Bill Bailey, Jo Brand, Rich Hall and such like)
I love Nancy DrewG, but not insert brain here