Okay. I have this thing where I always get quite excited when someone I never know was a bassist turns out to have form on the old four-string. I'm going to kick off with Demis Roussos. Yes. Forever And Ever, him from Abigail's Party. Described once as “a fully-laden banquet table beneath which a frightened lady appeared to be bleating for deliverance”   Well, I knew he was the singer in Aphrodite's Child but I'd never really clocked that he was the bassist and I'm going to stick my he