Well TIS, if you wanna go back to the days when we were young and mention some of the great comedians of those wonderful bygone days, how about...

Shelly Berman
Bob Newhart (most only know him from his TV shows)
Bill Cosby (same thing for him)
Myron Cohen
Flip Wilson
Jackie Vernon
Jackie Mason (still around, and I love hm)
Woody Allen (started in stand-up, long before his fim career)

"Difficult....not impossible"