Honourable mentions go to (in no particular order):
Prince Rogers Nelson
Sufjan Stevens
James Brown
Chris Cornell (Soundgarden, Audioslave)
Layne Staley (Alice in Chains)
D'Angelo
Johnny Cash
Robert Plant
Terence Trent D'Arby
Richard Ashcroft (The Verve)
Chester Bennington (Linkin Park)
Ron Sexsmith
Sebastian Bach (Skid Row)
James Brown
Mike Patton (Faith No More, Fantomas)
Isaac Hayes
John Farnham
W. Axl Rose (Guns'n'Roses)
Tom Yorke (Radiohead)
Chuck D (Public Enemy)
Zack de la Rocha (Rage Against the Machine)
Marvin Gaye
Bruce Dickinson (Iron Maiden)
Shawn Smith (Brad)
Eminem
Chino Moreno (Deftones)
Tom Araya (Slayer)
Liam Gallagher (Oasis)
James Blake
Sean Rowe
Jackie Leven r.i.p sad
Alexander Veljanov(Deine Lakaien)
Hans Theessink
Meatloaf r.i.p sad
Udo Dirkschneider(Accept)
Pete Steele( type 0 negative)
Steve Strauss