Naglfar
As Naglfar devours us all
As with almost any scene/genre, there's always a few bands that rise above the rest and do something that I feel is truly worthwhile and better than the norm, and Lamb Of God is one of those bands to me. They got (rather unfairly I feel) lumped into the Metalcore scene but I always found them to be something more akin to early 90s thrash.
I think their problem is that once you get lumped into that metalcore category, you're fucked for life. I saw them live years ago (2001? Or was it 2003? Jesus I'm getting fucking old), and maybe there was something metalcore to them back then.
They could sound like Von Canto now, and people would still call them metalcore.