This is my opinion and why !!!!
DUSK- US Doom /Death band that was just crushing slow and lumbering with mournful organs and the decay of the human spirit. This band never got the press or push it should have essential
Ras Algethi- This Italian Gothic Doom Death force is the band that took it to a new level for me . Mix Sorrow , Pain , Sadness and Darkness and Slow it down with a Gothic Horror movie back drop !!! This Band morphed in Canaan an impressive band on its own rights
Mournful Congregation- There are several Funeral Doom bands out there but pound for pound nothing comes close to these Ozzie's You can hear the Torment and Last breathe of life in this band. Enough Said
Dolorian- This Finish Force mixed Doom, Black , Ambiance and Goth elements into one of the most nightmarish landscapes one can ever here. The Music is as mysterious and haunting as the band itself.
Thergothon- One demo and Album and never again and they changed a genre and generation This is Funeral Doom , Doom Death and JUST DOOM!!!!. Another Finish force Slow creeping, errie, bleak, brutal, dark, ethereal and suffocating all at the same time.If there is any band you check out make it Thergothon!!!!