Stump the King - Tennessee Tuxedo

I got another letter from a TV lover in need. Unfortunately, I have no memories of the show being described. If any of you can help out, please do.

"I remember a show that came on TV when I was a kid. Most memories are mid to late 80s. I can't remember the first half, but for the last 5 minutes of so of every show, the host, an elderly gentleman, would go draw on a large sheet of orange paper the size of a freestanding revolving chalkboard. "

"It would usually be a fantasy scene with multiple little imps/creatures running around doing various tasks. One scene I sort of remember is underground. I always used to think it funny that he was just tracing with a marker and could just make out what he was tracing. I grew up in Texas, specifically Abilene and College Station if that helps. I've Googled every possible variation of the clues above to no end and it's messing with my sanity. Anything you know would be helpful. Thanks, TITUS"

Give Titus some help if this show rings any bells. he needs it since he's busy with Big Shots and all.

Here is this week's question...

What was the full name of the man who taught Tennessee Tuxedo and Chumley how things work?

Way to go , Lenny! You got it.