If I"m going with singers, you know like the thread says too, I would have to say Roy Khan, the guy who was the lead singer for Kamelot up until the last Album (Whcih the new guy is great, mind you, but no Khan.)

Roy just has so much energy to his voice, yet it always comes across as very controlled. It perfectly matches the grand and epic scale of music that is Power Metal.

And yeah, Freddie was awesome.