Donald Arthur

From Muppet Wiki

Donald Arthur is a voice actor, working primarily in Germany, who dubbed Beauregard (and guest star Zero Mostel) in Die Muppet Show and related apperances, and Boober Fraggle in Die Fraggles. He also dubbed Peter Ustinov in The Great Muppet Caper (as well as such non-Muppet productions as Death on the Nile) and as Old Major in Animal Farm.

Born in New Jersey, Arthur studied opera, and moved to Munich in 1960. He soon became involved in the dubbing industry, first looping English dialogue for German films and then re-dubbing English dialogue into German. His other German voice credits include Igor in Count Duckula, Kent Brockman in The Simpsons, and Chef in South Park.