List from the book Encyclopedia of Fictional People:

Barney Fife
Major Frank Burns
Shaggy

Can you think of any more??

Ralph Kramden-The Honeymooners
Fred Flintstone-The Flintstones
Zachary Smith-Lost In Space

Horshack - Welcome Back, Kotter

JJ Evans - Good Times

Lucy-I Love Lucy

Officer Carl Levitt - Barney Miller

John Taylor - Benson
Emile Peterson - Bob Newhart Show
Gladys Kravitz - Bewitched