Favorite singer and musician, and producer, and composer and, well everything that has to do with music (everything that he touches turns to gold, seriously).
DAN SWANÖ
You should know him from the legendary Edge of Sanity, or the amazing prog-rock band Nightingale, from death growls to clean singing he is amazing. If you like Opeth, who do you think was producing them in the early days and giving Akerfeldt some tips in good singing .
Name your favorite Melodeath band, he has been there, name your favorite melodic/progressive european band, he has been invited to do something (from mixing to sing or do a solo).For info in some of his work, see:
http://en.wikipedia.org/wiki/Dan_Swanö
and other really great singers i like:
Daniel Gildenlöw (Pain of Salvation)
Matt Barlow (Iced Earth)
Edu Falaschi (Angra) became a believer when i saw him live, he is spectacular.
Liv Kristine (ex-Theater of Tragedy, Leaves Eyes)