Originally Posted by Dextrimental
I would consider Dio a major influence on Power Metal, and as such consider Holy Diver a definititve album in that style.
I won't argue that Dio isn't a huge influence on the Power Metal genre, but I don't consider any of his work to be power metal. It's the same deal with Maiden, and a few other bands like them. It was essential stuff in the formation of the genre, but I don't think there was any true power metal prior to around 1985 and Helloween's Walls of Jericho, and the genre didn't really blossom for about 5 years more after that.