Heres a varity of styles and voices, that sing, I assume your talking about singers, most are old school, metal, commercial metal or hard rock but in those days the ability of the vocalist made or broke bands, these guys MADE IT ! I cant speak much for the newer vocalists
Geoff Tate - Queensryche 84 - 90 the ultimate voice during these years
Russell Allen - Symphony X, raw, gritty but can clean right up too, hes still on his game
David Coverdale
Sammy Hagar
Steven Tyler
Mikael Akerfeldt - I'll second that
Michael Metijevic - Steelheart if your into impossible highs with intense passion
Zach Stevens - Savatage
Rob Halford - Judas Priest
Ronnie James Dio
James Dewar - early Robin Trower years, thick, fat bluesy, great tone
edit : I forgot Roy Khan - Kamelot in my opinion the best voice in power metal today, he has dynamics similar to Tate
I have no comment on that DLR soundclip
Heres Queensryche/Geoff Tate in '87 its a MTV kind of vid not "live"
[ame]http://www.youtube.com/watch?v=G4afP2WHzoM&feature=related[/ame]