From Muppet Wiki

Character actor best known as a cast member on The Tracy Ullman Show and in supporting roles in films such as LA Story with Steve Martin, Raising Arizona, and National Lampoon's Christmas Vacation with Chevy Chase.

Credits

Dinosaurs: Roy Hess (voice), Andre (voice), Dolph (voice), Dinosaur Doctor (voice), Buddy Glimmer (voice), Wesayso Interviewer (voice)