Those who know me, will know that I'm about to post some Axel Rudi Pell stuff....
But which songs?! I technically do not have a favourite song from them, but here are some that impressed me most (Will not embed links, to keep the post short, because I'm posting a lot of songs):
Dark Waves of the Sea:
Axel Rudi Pell - Dark waves of the sea (Oceans of Time part II) - YouTube
Under the Gun:
Axel Rudi Pell-Under The Gun - YouTube
Don't say Goodbye:
Axel Rudi Pell - Don't say goodbye - YouTube
Falling Tears (some of most epic vocals I've heard):
Axel Rudi Pell - Falling tears - YouTube
Well thar, if you like what you hear, just keep following the links to other songs of theirs.
I also very much loved that Killswitch engage posted up there... I gotta get myself some of that music!
Other more harder bands (Alikes of Killswitch: melodeath, metal core) you guys might like:
Blind Guardian (more power-metalish, less melodic)
Deathstars (deep vocals, Rammstein-like)
Archeon (pure Melodeath)
Made of Hate (former Archeon, but style totaly changed, unique vocals)
Ensiferum (Finnish folk-power-melodic-epic-metal band, they've got epic stuff).