Esoteric
 

Amazing funeral doom band from the UK. All of their albums are breathtaking, but I especially love "The Maniacal Vale". It has a very dark sound, and the instruments and vocals are absolutely crushing. I've sometimes heard this band compared to Khanate, but I would say Khanate is a lot darker. This is still at that same end of the spectrum, though.

Here's a track from TMV, called Circle.

part 1


part 2

The only album I have by Esoteric is Subconscious Dissolution into the Continuum which is phenomenal when I am in the mood for it. It's a shame not many have heard of them.