George Carlin, hands down. I left my 'death bed' to see Carlin, and it was worth every moment.
Also enjoy Robin Williams, and Monty Python (yes, they did do some live dates in their career.) We've got a copy of Bill Cosby's "Himself" for roadtrips, and it's really funny!
__________________ "If you want to criticize my methods, fine. But you can keep your snide remarks to yourself. And while you're at it, don't criticize my methods." Rupert Giles, BtVS
to see Carlin, and it was worth every moment. 
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