Theory in Practice, Psycroptic and i'll also second most all of the other recommendations... I suppose you could probably include Cephalic Carnage, Decapitated, Suffocation and Lykathea Aflame depending on how loose a definiton your looking at for tech death
Deffenitely check out Cryptopsy if you like mindblowing drumming, although the rest of the musicians are plenty good, Flo Mounier is considered one of, if not the best in all of Death Metal.
Death
Quo Vadis
Carcass
Atheist
Suffocation
Immolation
Obituary
Morbid Angel
Augury
Necrophagist
Cenotaph
Cryptopsy
Gorguts
Cynic
Cannibal Corpse
Pestilence
Theory in Practice
Gorod (formerly known as Gorgasm)
Domination Through Impurity
Beneath the Massacre
!T.O.O.H.! (grindy, but also very creative with some tech death metal-sounding parts... should suit your needs)