Damn! Yaz've made this hard! Ok then, if I must...
Negura Bunget -
Om
Nokturnal Mortum -
Голос сталі (Voice of Steel)
Falkenbach -
Ok nefna tysvar ty
Turisas -
The Varangian Way
I didn't really want to vote any off, so may your soul shrivel up for making me choose.