List from the Encyclopedia of Fictional People:

Louie De Palma (Taxi)
Grumpy (Snow White & Seven Dwarfs)

Who's missing? My vote - Officer Carl Levitt (Barney Miller).

Billy Barty
Joe Pesci
Mickey Rooney
Herv'e Villechaize (Fantasy Island)

Fred Mertz(I Love Lucy)
Ralph Kramden(The Honeymooners)

Ida Morgenstern (MTM & Rhoda)

Marie & Debra Barone (ELR)

Dee Thomas - Whats Happening

Michael Evans - Good Times

Gloria Bunker Stivic

Gladys Kravitz (as played by Sandra Gould) - Bewitched

George Costanza - Seinfeld

George Jefferson
Fred G. Sanford The G is for Grouchy, lol.

Arnold Jackson - Different Strokes

John Taylor - Benson