Don Rickles and especially Steve Martin belong on any top 10. Recency bias!There are a lot that could be in the top 10. I just was never a big Bruce fan.
I will say that he may not be top 10 but the funniest comic tape i ever heard was riding in the car stoned with a friend of mine and he put in an Andrew Dice Clay comedy cassette somewhere around 1980. His bit about how gay men could be attracted to other men might be the hardest Ive ever laughed in my life. Just remembering still makes me laugh.