Your top 50 Metal vocalists

I'll give this a pop. Here's my top 10 (off the top of my head):

Bruce Dickinson (goes without saying really)
Mike Patton
Layne Staley
Zetro
Tom G Warrior (urgh!)
John Tardy
Keith Caputo
Peter Steele
Simone Simons
Martin Walkyier

As for non-metal, Morrissey, Tori Amos and Kate Bush!!!!
 
Holy fucking christ in hell, you guys all forgot

Daniel Heiman (Lost Horizon)
Jorn Lande (Like a million bands)
Mikkel Sandager (Mercenary)

Those are some thet pop to mind right now. You guys got most everything else covered