Frank Welker

Franklin W. Welker (born March 12, 1946) is an American voice actor. He has provided a wide range of character voices, sounds, and other vocal effects that have appeared in American television and films over the past 40 years. He is ranked as the number one "All Time Top 100 Stars at the Box office" based on the total revenue his films have generated. His work in more than 90 films places him ahead of Harrison Ford, Tom Hanks, and Samuel L. Jackson.
In the 1980s, Welker voiced Megatron, Soundwave and his cassettes, the Dinobot Sludge, and Galvatron (replacing Leonard Nimoy in Season 3) in the Transformers cartoon. In this series, he formed a team with Chris Latta, who voiced Starscream, Megatron's second-in-command. In 1988, Welker provided the voice of Rulon leader Krulos in the TV series Dino-riders. In this cartoon, he again teamed up with Chris Latta, who (coincidentally?) voiced Rasp, Krulos' second-in-command. In G.I. Joe, Welker also worked alongside Latta. (Other actors who appeared in Transformers, Dino-riders, and G.I. Joe include Jack Angel, Charlie Adler, and Peter Cullen.) In a famous error from Transformers, Soundwave's unmodulated voice was revealed to be nearly identical to that of Dr. Claw from Inspector Gadget.