12. Trent Reznor - Nine Inch Nails
There were a lot of contenders for the greatest rock singer of the 90's to choose from. From the sounds of grunge in the decade's infancy to the ferocious growls in the metal scene, each heavy genre seemed to have a great decade thanks to its famous screamers. Out of the best of the bunch, chances are no one expected an electronic producer with a piano to be a prime candidate.
Even if that build up is far from hard rock, Trent Reznor was able to take all the dark sides of electronic production to create what we know today as industrial. Thanks to albums like Pretty Hate Machine and the Downward Spiral, the world got one of the most feral voices to come out of the early 90's. As opposed to being a growl like metal or angsty like grunge, Reznor's voice sounded like a man possessed, almost as if he was using each dark song as a way to unleash the demons trapped inside of him.
Reznor had already made a name for himself as a producer, but the success of Nine Inch Nails showed the world that this disturbed approach to music could work wonders on the charts. He may not be the first person you think of when it comes to hard rock singers, but without Trent Reznor to lay the groundwork, we wouldn't have bands like Rammstein or Marilyn Manson today.