Don Messick
Donald Earle Messick (September 7, 1926 – October 24, 1997) was an American voice actor, known for his performances in Hanna-Barbera cartoons.[1] His best-remembered voice roles include Scooby-Doo; Bamm-Bamm Rubble and Hoppy in The Flintstones; Astro in The Jetsons; Muttley in Wacky Races and Dastardly and Muttley in Their Flying Machines; Boo-Boo Bear and Ranger Smith in The Yogi Bear Show; Sebastian the Cat in Josie and the Pussycats; Gears, Ratchet, and Scavenger in The Transformers; Papa Smurf and Azrael in The Smurfs; Hamton J. Pig in Tiny Toon Adventures; and Dr. Benton Quest in Jonny Quest. From Wikipedia.
Filmography
The Smurfs
The Flintstones
The Transformers
DuckTales
Tom & Jerry Kids Show
Tiny Toon Adventures
Super Friends
The Real Ghostbusters
The Jetsons
Scooby-Doo and Scrappy-Doo
Dastardly and Muttley in Their Flying Machines
Scooby-Doo, Where Are You!
Freakazoid!
The Yogi Bear Show
The New Scooby-Doo Movies
Top Cat
Bobby's World
Gumby
Sabrina, the Teenage Witch
Droopy, Master Detective
Scooby's All-Stars
A Pup Named Scooby-Doo
The Tom and Jerry Show
The Scooby-Doo/Dynomutt Hour
Jonny Quest
Heathcliff
Frankenstein, Jr. and The Impossibles
The Huckleberry Hound Show
The Flintstone Comedy Show
The Atom Ant Show