I bought his comedy albums in high school, and we would laugh until we cried listening to him.George Carlin.
Just... George Carlin.
I am just now discovering Louis CK. I've missed out on so much.
I'm not saying not to enjoy his comedy, but be careful when looking through his content - he's one of those comedians who is like 95% really funny stuff and 5% mean-spirited awful stuff.