Five comedians to watch/listen to if you want to learn how to do it. (No Cosby list.)
Richard Pryor - the GOAT. You can literally learn everything from his specials and albums
Woody Allen - I know, but if you want to learn structure and working within a limited performing ability he’s the one
Emo Philips - one of the greatest joke writers ever
Mitch Hedberg - joke writing + delivery
Rodney Dangerfield - joke writing plus timing like a Swiss watch