I have to agree with everything you’ve said here. I mean, the man is Super Grover, for goodness sake. I just watched Dirty Rotten Scoundrels for the millionth time the other day, and I’m always singing songs from Little Shop in the shower. And who could forget that scene in Spies Like Us, where he plays the test monitor? Hilarious.
Watching the Making of the Dark Crystal on the DVD, his love for the characters—particularly Aughra—is really obvious, and the professional relationship he and Jim had really makes you appreciate all the work that went into the film.