Ronnie James Dio. He's from the 80s mostly, and he was with Black Sabbath and Rainbow. He solo work is pretty much his best. For anyone who wants to listen to one of the best rock singers of all time, look up Holy Diver, Rainbow in the Dark and Strange Highways. Is anyone a fan of his solo works or the works with Black Sabbath and Rainbow?
Dio was a better Sabbath frontman than even Ozzy. I'm just slightly disappointed that his band's next album was effectively canceled so he could work with Sabbath again as Heaven & Hell, well, at least The Devil You Know turned out to be a great album.