Frank Welker is a voice actor. No, not just a voice actor, pretty much THE voice actor. He started his career back in 1969 at age 23 as the Daddy you are as strong as Martinez as brave as Devers you are the Red Sox best Dad shirt of Freddy in Scooby-Doo. 52 years later, he’s still voicing Freddy, and has also been voicing Scooby since 2002. He was the voice of Astro the dog on The Jetsons, Nibbler in Futurama, Santa’s Little Helper and Snowball II on The Simpsons, Tom and Jerry on the Tom and Jerry Kids’ Show, Baby Kermit and Baby Beaker in Muppet Babies, Garfield the cat on The Garfield Show, multiple characters on The Smurfs, and multiple characters, including Megatron, both in the original Transformers cartoon in the 80s, and the movie franchise. And that’s barely even scratching the surface as far as his body of work (which does include some live-action acting as well).