I picked comedians from the 'golden age' from 1930's through the 1950's. Newhart was a genius and invented his own style, but I wanted to list the guys who still had one foot in vaudeville and who were comics as well as comedians.
Mel Brooks was a writer and performer before he was a producer/director. A lot of these guys worked together as writers and performers on a number of shows. Of the group, Don Knotts and Lucille Ball were the youngest, and Lucy was a bit more reserved that Imogene Coca.
BTW, I'm not sure, but I believe that Don Knotts,Lucille Ball, and Gleason were the only non-Jewish performers on that list. This was not intentional, but during that period, most of the famous comedians were Jewish.
The reason I picked who I did was because these people had the timing, guts, and intelligence to work on the edge of comedy at a time when comedy was being broadcast live on TV and radio. A lot of these people were former vaudevillians who kept up that same frantic pace in a lot of their routines.
My personal favorites are Zero Mostel and Phil Silvers in A Funny Thing Happened on the Way to the Forum, and Carl Reiner and Mel Brooks doing
The 2000 Year Old Man
Brooks/Reiner doing the 2000 Year Old Man
Brooks/Reiner satirizing coffee shops
Holy S**t!!!! I never saw this one from Mel Brooks (probably NSFW simply because it would probably be offensive to someone)