Mikael Akerfeldt (Opeth, Bloodbath, Ayreon)
Christian Alvestam (Scar Symmetry, Solution .45, Miseration)
Matt Barlow (Iced Earth, Ashes of Ares, Pyramaze)
Sheila Chandra (solo, Monsoon, Lord of the Rings: The Two Towers)
Sara Gazarek (solo, Gazarek/Nelson)
Tinna Karlsdotter (All Ends, Evergrey)
Dan Swano (Nightingale, Witherscape, Edge of Sanity)
Daniel Tompkins (TesseracT, solo, White Moth Black Butterfly)
Marjan Welman (Autumn, Vetrar Draugurinn, Demiurg)
Chelsea Wolfe (solo, Mrs. Piss, Converge)
Wow do I feel bad leaving so many people off. I really need a top 50.