Completely, entirely subjective, of course - but I can't believe Dara O'Brien is as low as he is. He's below Jo Brand and Al Murray, for goodness sakes!
He's a guy of genuine wit, and unlike many he uses masses of spontenaity and audience participation, rather than relying on the same scripted gags and stories. His routines are all over the TV, and I've very rarely seen the same segment twice.