Well Vermin old chum there's really not a whole lot more to be had to be honest but how about.....
Deathmass - Hailing from Pittsburgh (home of the almighty Dream Death) their Prolonging the Inevitable demo comes highly reccomended.
Excruciation - Swiss band who come across as sort of a German thrash (think early Kreator) mixed with Celtic Frost kind of band. I have the Last Judgement EP and it kicks quite a bit of ass. The band put out several demos but broke up in 1991. Reunited in 2005 they now play gothic horseshit of which everything they have released should be avoided like the clap.
Ritual of Agony - Des Moines, IA band comes off as Dream Death with Bob Mayo of Wargasm on lead vocals with the Half Past Dead demo being highly reccommended for that very reason.
Leprosy (NY) - Extremely raw and low-fi Celtic Frost worship albeit with a bit more pep in it's step. If you can stand the occasional dead air, background mumbling and instrument noodling while the recorder was running than seek this out as it's not to bad, not great either, but not bad.
Glycine Max - Crusty version of Dream Death would be the best way to describe them as they come off as HC Punk meets Celtic Frost on Violent Mind/ /Peaceful Heart, their only release.
Cyber Kultur - These Texan doom/thrashers deliver a sort of more Solitude Aeturnus'ish approach to their Celtic Frost worship or at least the vocals lend it a more epic feel IMO. Not too shabby, although a bit of a deviation from the standard doom/thrash style.
Exitus - Fairly solid Finnish doom/thrash although it leans a bit more to the DOOOOM side of things or at least on the Statutum Est Hominibus Mori demo it does. In fact one could call this doom/death only not nearly death metally enough if that makes any sense.
Apparition (NY) - Death/thrash band that dabbles in some DOOOOMIER bits throughout most songs. I have all of their demos of which the 1988 demo as well as Human Fear are my favorites.