Based on the long list of things he's been in I've probably seen LoB
's great uncle on the screen a thousand times. That's very cool...it must be something that gives your family quite a bit of happiness, pride and satisfaction.
The closest I can come to saying I have a relative who's well known for being on-screen is my cousin Ken Farmer, one of the most well known appraisers and personalities on PBS's Antiques Roadshow.
My late maternal grandfather was a well known stage, radio and recording musician (country and bluegrass) in Southside and southwestern Virginia, but most people outside of those areas and perhaps adjoining parts of North Carolina and West Virginia likely never heard of him.