I've always been fascinated by Aryeon, not a big fan but their music has always been interesting, they certainly don't write songs the way other Prog? metal bands do. But, yeah, I agree with you on the use of vocals harsh and clean.
But there is only one person you cannot beat due to the sheer power in his voice, Marco Hietala.
I know I already posted Nightwish, but hey, they deserve another mention.
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"I'm staunchly atheist, I simply don’t believe in God. But I'm still Catholic, of course. Catholicism has a much broader reach than just the religion. I'm technically Catholic, it's the box you have to tick on the census form: 'Don't believe in God, but I do still hate Rangers..'"