I'm a big fan of Ricky Gervais and Stephen Merchant. But, I have to say that there are many more American comedians that I am a fan of.
its semantics. americans sometimes dont get our humour in uk and british dont get the american humour.
I don't get American humour. Brits find something funny the first time and less funny every subsequent time. But Americans find something funnier the more times you hear it. I've literally seen a comedian constantly repeating something and they just keep laughing more.