Dio

Dio was a metal band established in the eighties who were considered one of the ancestors of power metal. They were led by the late Ronnie James Dio, who also replaced Ozzy Osbourne as the frontman for Black Sabbath in the eighties until his death in 2010, after which Osbourne returned as vocalist. While Dio only had a few successful albums, they did have several rock hits. They had one gold compilation and two gold video albums. He was previously in the progressive metal band Rainbow.