George Carlin did some really good stuff, Rape can be funny, Golf Courses for the homeless, he did so many good routines in his day.
I've spent more time following local comedians than I have international, guys like Col Elliot and Oscar Swarve did regular shows here back in the 80's and 90's. The sorts of shows where $50 would buy you a ticket, a meal and half a dozen beers for the night and you'd get three hours of comedy and fun.
In the 00's I did watch a bit of the Blue Collar Comedy team and Rodney Carrington but while the DVD's are all still here I don't think I've put one on for the best part of 10 years.