Klaus Nomi may look like a Hitler robot on one of his heroin trips but he was actually a brilliant opera singer. He had an incredible range spanning at least three to four octaves: full tenor and even baritone range, possibly more.
But Nomi has one weakness: selection. I can forgive his M.O. If you can sing as good as him you can be as strange as you wish. What I have a problem with is two things: 1. opera and pop doesn't mix. and 2. via the old expression: JIJO (junk in junk out), no matter how well you perform, if you try remaking a bad song, it's still going to be bad. It's like putting a murderer in a suit; he's still a murderer.