10. Dio: Holy Diver

The concept for this cover came from none other than Ronnie James Dio's wife Wendy. But it was Gene Hunter who rendered it and even though the cover seems to depict a devil killing a cleric, Dio himself denied it and said it can be interpreted in the exact opposite sense as well. When viewed upside down, the Dio logo spells the word 'Devil'. Even though the claims that all this was done on purpose were immediately dismissed, this will always remain to be one of the most fascinating album covers ever made in the history of heavy metal music.