Jerry Nelson
Beard
/
Whatnot
/
Announcer
/
Bubba
/
Combat Lobster
/
Cow
/
Extreme
/
Fish
/
Fred
/
Garbage
/
Harry Stapleton
/
Jack the Upright
/
Jo Beth Garfdoohoo
/
Luncheon Counter Monster
/
Miner
/
Narrator
/
Raccoon
/
Ralph Robin
/
Self
/
Shark
/
Sheep
/
Slim
/
Spot
(9 episodes, 1989-1992)