Accept, Avenged Sevenfold, Disturbed, Epica, Within Temptation etc.
My most favorite song of Accept is Die by the Sword, it has inspired some aspects of fiction universe of my comics (I'm talking so much about the things I haven't draw yet... ooh )
This song is so cool, not only in vocal, but in lyrics as well:
This refrain is my favorite part:
What was built up in thousands of years
In just a moment is destroyed.
Have we lost all compassion and love,
Cast our souls into the void?