Just to clarify there are indeed some very funny women comedians especially over in America. In the context of a sketch show or panel show, they can be just as funny as their male counterparts.
Specifically in the stand-up setting of "1 person, a stage and a microphone" I must admit I've never seen one that's made be belly laugh like the top male comedians can. But that obviously doesn't mean they aren't out there.
Frankie Boyle live: was good on Mock the Week but his live stuff didn't work so well. Was making jokes about Madeline McCann, cancer victims and Jordan's kid. No one was really laughing and thought it was a bit too much. I get that being offensive is his thing but...
Michael McIntyre: saw him a few years ago at the festival. Best stuff was improvised, just didn't do it for me.