Don Messick is one of the most beloved voice actors of all time. He had a long career of voicing iconic characters from Hanna-Barbera cartoons. His most iconic role is voicing Scooby-Doo. He was Scooby's voice actor for several years. After Don Messick retired, several actors voiced Scooby. Eventually, the role went to Frank Welker, the original voice of Fred Jones.
Don Messick's iconic Hanna-Barbera roles:
Scooby-Doo in Scooby-Doo, Where Are You?
Boo-Boo and Ranger Smith in Yogi Bear
Pixie in Pixie and Dixie and Mr. Jinks
Bamm-Bamm Rubble and Hoppy in The Flintstones
Astro in The Jetsons
Muttley in Wacky Races
Mr. Peebles in Magilla Gorilla
Dr. Quest in Johnny Quest
Atom Ant in Atom Ant
Ricochet Rabbit in Ricochet Rabbit & Droop-a-Long
Blip and Zorak in Space Ghost
Spot in Hong Kong Phooey
Scarecrow in Super Friends
Papa Smurf and Azrael in The Smurfs
Don Messick's iconic Hanna-Barbera roles:
Scooby-Doo in Scooby-Doo, Where Are You?
Boo-Boo and Ranger Smith in Yogi Bear
Pixie in Pixie and Dixie and Mr. Jinks
Bamm-Bamm Rubble and Hoppy in The Flintstones
Astro in The Jetsons
Muttley in Wacky Races
Mr. Peebles in Magilla Gorilla
Dr. Quest in Johnny Quest
Atom Ant in Atom Ant
Ricochet Rabbit in Ricochet Rabbit & Droop-a-Long
Blip and Zorak in Space Ghost
Spot in Hong Kong Phooey
Scarecrow in Super Friends
Papa Smurf and Azrael in The Smurfs