Frank Welker

Franklin Wendell Welker (born March 12, 1946) is an American voice actor. He is best known for his role as Fred Jones from the Scooby-Doo franchise since its inception and as the voice of Scooby-Doo since 2002. He is also known as the voice of Megatron in the Transformers franchise, and as the voice and vocal effects of Nibbler on Futurama.
In 2016, Welker was honored with an Emmy Award for his lifetime achievement.