[yuriyuri]

I have some more suggestions.

But before that:
@Toastyzeus
I noticed in your original post, you said ありがとう at the end of your post.
Although this is the music section, since I know you are studying the language, you should say よろしくおねがいします here, instead.

In English we can say "Thank you" but in Japanese you should use よろしくおねがいします

Anyway, onto my other suggestions.
I am not sure again if these would match your tastes but have a listen anyway
I did listen to Lamb of God and I have always had trouble finding Japanese bands like that...
Well, anyway, as I said, have a listen to these and see what you think.

Loudness


Area 51


Jikuu Kaizoku Seven Seas