Steve Whitmire
The Muppet Show as Rizzo the Rat, Lips, Foo-Foo, Billy Boy, Caveman, Geri & the Atrics tuba player, Leo (episode 403: Shields & Yarnell), Rowlf the Dog (occasional, hands only), Security Guard, The Snorers' Chorus member, Thog (episode 502), Timmy Monster (occasional, voice in episode 423), Trevor the Gross, The White Rabbit, Winky Pinkerton (episode 308: Loretta Lynn), Zeke (1979 - ca. 1980s)