Every musician I knew had the Harvey Mandel album and followed him when he later joined Canned Heat, but I wasn't aware he had recorded with The Stones. Ry Cooder also did, and has told a very interesting story about that experience. I don't want to bash The Stones on a thread dedicated to them, so those interested will have to look it up for him or herself ;-) .
One guitarist who was auditioned as a replacement for Brian Jones was Dave Edmunds; I'm real glad he didn't get the gig, as I love his solo albums and the one he did as a member of Rockpile (with Nick Lowe, Billy Bremner, and Terry Williams---a true super group).