An example is Dan Whitney aka Larry the Cable Guy. For the past decade or so his interviews, movies, PSAs, etc., are all as Larry the Cable Guy. He basically lives the character whenever cameras are rolling (presumably becoming Dan again when with his wife, friends, family, etc.).
Jim Varney, most famous for his Ernest P. Worrel, but he appeared as himself in interviews and did other characters as well (Jed Clampett, a prince on Roseanne. Who are some other celebrities like Whitney/Larry who always appeared on camera as their alter ego?
His interviews can be confusing because he’ll flit between Stephen Colbert (hard T- his real self) and Stephen Colbert (‘bear’- his fictional self). It can be confusing. I’ve wondered how he keeps sane playing two people at all times. (Still a shocker that his ‘real’ self is a Sunday School teacher at a Catholic church.)
Father Guido Sarducci (he made appearances on SNL and also talk shows–I especially remember him appearing on Letterman’s show several times in the 80’s.
I saw her (him? it?) just the other day in a man’s suit for the “wrap-up” show of “RuPaul’s Drag Race” (basically, “America’s Next Top Model” for drag queens). Looked like Curly Neal, sounded like Diana Ross.
I saw Penn & Teller in Vegas a few years ago and was surprised when after the show they both ran to the back of the theater so that they could shake hands and chat. Teller was chatting away happily, not silent at all.
I’ve also seen him on a documentary about magic in China, and I think he spoke on camera in that one.