I've seen George Carlin, Ron Funches, Charlie Murphy, and Patton Oswalt live. It was awesome to see Carlin live, but unfortunately a good chunk of it was just old material i'd already heard, so it could've been much better. I've seen Patton a few times now, and that dude does not disappoint. The last time I saw him he was workshopping a bunch of stuff, but it was still really good.