Shelley Berman,Jack Lemmon..that I mentioned? Just a part of Americana humor that's gone. The stammering guys..gone. Dick Van Dyke, Bob Newhart,Barny Fife, Lucy,Gleason, from the height in the 50's and 60's to Woody Allen bridging that to the 70's with Richard Dreyfuss,Paul Lynde and Dustin Hoffman...always somebody. By the 80'- 90's.Howie Mandell, Adam Goldberg circa 1998...now? I don't know of any. None that are A list.
I know you can think of plenty more from the past.Common for character actors in sitcoms.
The lead singer in BTO- "You aint see--see-see-see-seen nothin yet!"
Wait!..we always have Scott Ostler as nervous stammerer.
That's what you get Scott for taking a gratuitous potshot at me.