Dr. Teeth is a supporting protagonist from Jim Henson's Muppets franchise. He's the band leader for Electric Mayhem, which consists of Floyd Pepper, Janice, Animal and Zoot. With green skin, a scruffy beard and a mouth full of teeth, Dr. Teeth is instantly recognizable by his sweet, groovalicious way of speakin', man.
Originally performed by Jim Henson, his Dr. Teeth is what started it all - the jive-talking and gruff voice. Another iconic Muppets character.
John Kennedy was next to take over Dr. Teeth, mostly for video game adaptations of Muppet titles. John's not the greatest, but he's not too bad, either.
For the vast majority of Dr. Teeth's post-Jim Henson appearances, Bill Barretta performed him. Bill's voice is a little gruffer than Jim's, but is probably the closest to his, despite that.
Victor Yerrid played Dr. Teeth in the From the Balcony shorts. Victor's Dr. Teeth has a lighter, more soothing voice than most, but still nails the attitude.
For a brief stint in A Muppets Christmas: Letters to Santa, Martin Robinson portrayed Dr. Teeth. Despite the limited material, Martin shows real promise, coming very close to the same inflections as Jim. I think he's just as worthy a successor to Jim as Bill is.