Rob Halford... my friend said he saw them a bunch of times and he used to yell really goofy, uber-hetero stuff from the stage, like "eat p@$$*y until your jaw falls off!!!" Kind of funny when it turns out he's a flamer!
There's also a hardcore band called Limpwrist. I think all of the members of that band are gay.
I saw Priest in '86. We were about 4 rows from the stage and me and a friend had stacked our chairs so that we standing higher than everyone else. We thought we were so cool because Halford kept coming over and pointing to us and waving. After he blew us a couple of kisses we decide to get back down.
It was a couple of years later when I started hearing the rumors of him beign gay.