Maynard James Keenan vs. Ozzy Osbourne – President of Heavy Metal Election, Quarterfinals

This fourth and final matchup in the President of Heavy Metal election quarterfinals features metal music's maddest scientist, Maynard James Keenan. It's difficult to categorize the music of Tool, other than it sounds like Tool, but the band's experimental and progressive brand of metal has cemented the group as one of modern metal music's finest acts. Plus, it would be pretty amazing for metal's White House to be built on an Arizona vineyard.