No fair! Shambles started off with the one I'd post!

Rick's #3 is the guy who supposedly sold his soul at an intersection somewhere. His #4 I don't get, but I'm pretty sure he couldn't read music and his first name was a question. Last name might be something that rhymes with that of a notorious US president, but I'm not sure.

Mrs Duck is, I think, referring to the woman who's married to a guy who plays guitar very well and used to be in a folk-rock band. a couple of American musicians had a hit with (mostly) his arrangement of a song.

Oh, this guy's real name was Jimmie Miller. He wrote some great songs and frequently sang with his finger in his ear. He was married to a woman who's related to a guy who plays a disappearing banjo and who sometimes sings with another guy who had a funny first name and wrote a humorous song about a massacre and who's father was famous and wrote a serious song about a massacre that was removed from the DT because the publishers are anal-retentive and think someone may feel compelled to give them money to get the lyrics even though a chunk of people in the known universe have the song on a recording by somebody, another chunk has it in a songbook, and portions of the above chunks actually sing it themselves.