Quoted from vid1900:For a perfect hard rock album. Black Sabbath's Heaven and Hell.
Sabbath finally got rid of that clown Ozzy, and got the greatest singer in the history of music; Ronnie James Dio.
This allowed Sabbath to create their greatest album.
8 perfect tracks.
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I'll give you Heaven and Hell and raise you Holy Diver.
Holy Diver is my 2nd favorite Heavy Metal album of all time. Only the epic Chemical Wedding by Bruce Dickinson is better in my opinion. Not one wrong note on either Diver or Wedding.