Maybe it's just me, but I find it hard to find a good, heavy band that "does it for me" but doesn't ruin it with crappy vocals.
Deterior is getting it right in my book.
If you like Earth, AsVa, Nadja, or just stoner/doom metal, this might just float your boat.
It waxes outside the pure metal genre into ambience/downtempo organics, but diversity is a plus for me. YMMV.