Here are some of the Sesame Street characters Rick Lyon was famous for puppeteering:
* Bert: One half of the beloved duo Bert and Ernie.
* Cookie Monster: The lovable, blue, cookie-obsessed monster.
* Telly Monster: The anxious, but lovable monster who learns to cope with his feelings.
* Guy Smiley: The enthusiastic host of "The Super Grover 2000 Show" segment.
So, while Rick Lyon didn't provide the voices, he was the person behind the puppets, bringing their personalities and movements to life.