There used to be an early 1970’s Metal Band from Columbus, Ohio called ’The Godz’. They were very good but not all that prolific, so they supported a lot of main acts like ’Kiss’.
Though not Metal, I saw Canned Heat at an outdoor festival a few years after ’Blind Owl’ Alan Wilson died. Bob ’The Bear’ Hite was a huge presence. That was a total biker event.