Hansi Kursh is a good one (Blind Guardian). James LaBrie's also rather talented, but the best vocalist I'm aware of, is quite surprisingly Jimmy Urine (from MSI). That guy sings about the stupidest shit, but he does it so well and with such dynamics and range
Also whoever the vocalist(s) of Three is/are. Three has great vocals as well
Twally Spocks is best pony ♥ Proud user of Etna Sliders. You'll never pierce my admintium armour. Turns out, someone did!