Yes, the Dillards were semi-regulars on Andy Griffith. And of course Waylon Jennings was the balladeer on James Best's later show, The Dukes of Hazard.
Funnily enough, my dad went to college with the guy who played Boss Hogg, whose name was Sorrel Booke. He once played a visitng general on MASH, so if you see that you might say "hey, isn't that Boss Hogg?" Sitcoms remind me of another great early role: Janet Jackson as Penny on Good Times.
I was just watching Red Dragon with the director's commentary, and it turns out that Dolarhyde's mother's voice was provided by Ellen Burstyn in an uncredited voiceover. And, in another music connection, there is a janitor that you only see in one scene, cleaning Hannibal Lecter's toilet. You only see him from the top. He is a balding black man about 40. It turns out he is "Run" from the pioneer hip-hop group Run DmC. He originally had a larger role, but it was cut from the film.
In the meantime, they got an actor called Frankie Faison to play Lecter's guard, Barney. He is, interestingly, the only actor to have been in every Hannibal Lecter film. He played a cop in "Manhunter," the original version of "Red Dragon" (in which Brian Cox played Lecter). He then played Barney in all three Anthony Hopkins flicks.