From Muppet Wiki

Carter was Howard Tubman's elderly, doddering butler in "The Tubmans of Porksmith" sketches on Muppets Tonight. These sketches were exclusively aired as UK Spots.

Carter also appeared in Muppets From Space, working as a butler in The Muppet Boarding House. The character was later rechristened Faversham and became Miss Piggy's butler for a Donna's Day appearance.