Don Messick

Donald Earl "Don" Messick (September 7, 1926 – October 24, 1997) was an American voice actor best known for his work for Hanna-Barbera. His best remembered vocal creations include Scooby-Doo, Bamm-Bamm Rubble and Hoppy in The Flintstones, Astro the dog in The Jetsons, Muttley the dog in Wacky Races and Dastardly and Muttley in Their Flying Machines, Gears, Ratchet and Scavenger in The Transformers, Papa Smurf in The Smurfs, and Dr. Benton Quest in Jonny Quest. He also did the voice of Snip in the Rankin/Bass 1979 movie Jack Frost.