I think Ozzy Osbourne should have been on this list. Black Sabbath basically invented heavy metal, which has been a staple in rock music for over 35 years. Bands ranging from Metallica to Rage Against the Machine have cited Black Sabbath as their biggest influence. Without Sabbath, there wouldn't be a heavy metal, there'd be no Metallica, etc. I am going on the record as saying Ozzy Osbourne deserves to be mentioned in the same regard as Frank Sinatra and Elvis Presley.