All-time favorite in that genre is Anata. Odious Mortem, Psycroptic, Neuraxis, Necrophagist. Lots of crossover with other metal subgenres, I'd throw Nile and Decapitated and Lykathea Aflame in there too.
Mostly out-dated stuff since I dropped out of being up-to-date with music scenes for a couple years (easy to do when you have hundreds of albums to cycle through on your ipod/laptop) and am just starting to get back into the swing of things. Open to suggestions for newer tunes, for sure.
oooh Spawn of Possession's a great one, don't know how I forgot them in my off-the-top-of-head list. Gorguts I've never checked out.**** yeah! My very favorite Tech Death bands are probably Gorguts and Spawn of Possession, but you named some great bands too.