1. Ozzy Osbourne
John Osbourne is an English singer, songwriter and TV personality. He gained fame in the 1970s as lead vocalist of Black Sabbath, earning the nickname "Prince of Darkness".
2. Rob Zombie
Rob Zombie is a horror/sci-fi artist with 15 million albums sold.
3. Bruce Dickinson
Paul Bruce Dickinson is an English singer, lead vocalist of Iron Maiden known for operatic singing and stage presence.
4. Dave Mustaine
David Scott Mustaine is Megadeth's co-founder, frontman, songwriter, and sole member.