erm...no, not really. =) I'd put Spawn of Possession right up there next to Psycroptic, but ummm, otherwise, no, those two and Necrophagist pretty much control tech death I think. Also possibly Iniquity, every song crammed full of great riffs and god drumming.
Consider Incinerate if you don't know them. Some good rhythms and heavy riffing, fairly complex song structures.
Wormed are extremely low end deathgrind, but their rhythms and song structures are absolutely brilliant. An indonesian band called Siksakubur are quite comparable, but have lots of small flairs of attractive melody thrown in here and there, as well as generally having crazier song structures.
If you like Severed Saviour, you'd probably like fellow labelmates Disavowed, and also Capharnaum. Both have very recognizable, almost catchy riffs, good solos and good vocals. Nice and heavy and aggressive too.
Neuraxis: great band, very heavy, very fast, very technical, but also hugely melodic.
Lykathe (Lykathea Aflame) are comparable, but are heavier and their melodies are much 'happier' and strangely uplifting. Not really my cup of tea, but most brutal/tech death fans cum over them.
At the extreme end of technicality and insanity, you should check-out Nefas, who are like Immolation and Cryptopsy mixed with the ferociousness and speed of Krisiun. Utterly unmemorable and random, but amazingly busy.
Psychofagist are similar, but slightly more conventional. The odd catchy riff, but otherwise very spasticated and heavy.
oh, and Yattering. Very inaccessible, no memorable riffs at all, very jolted and randomly shifting tempos and rhythms, but still strangely mesmerizing for all that.
and of course you've got your Cryptopsy, Immolation, Krisiun, Decapitated, Origin etc.
