Here's a really good one. Country Joe McDonald tells us about smoking banana peels. http://youtu.be/PeAIYOF5p8c
Here is a link to an interview with Eric Clapton. I think it was done in 1968, because there's a photo from 1968 at the top of the article. Was Rolling Stone around back then? I have no clue, and don't really want to google it. Anyway, here is an article http://www.rollingstone.com/music/features/the-rolling-stone-interview-eric-clapton-19680511
Elvis Costello talks about (then sings) his song Tramp The Dirt Down, a condemnation of the then Prime Minister Margaret Thatcher in 1989: https://www.youtube.com/watch?v=9Znn5a-88tY
I never liked Status Quo but I once listened to a radio interview with him and he came across as an erudite and insightful person. I have also listened to Suzi Quatro on the radio one day. She also came across as really cool even though I never liked her music.
