Lots of votes for Miles. Not surprising. Many other artists mentioned here whom I hadn’t heard of. I will try them. I think Joe Cocker (listen to St. James Infirmary ), Jimi Hendrix was cool. Later SRV. Chet Baker, for sure. Les Paul I would add. I would add Sade, Bonnie Raitt, and Natalie Merchant. But then who can forget the J Geils Band and the Sensational Alex Harvey Band! Block of ice cool.