Definitely check out No Dominion. It's a great tech death album. I'm just getting around listening to their new album but it sounds really interesting. No, they're not deathcore and if you listen to them with that definition in mind, it makes sense as describing them, especially the new album so far.
I haven't heard this band but based on the assumption that the bio says their main goal is to "harmoniz[e] Brutal Hardcore rythmics and technical Death Metal", then that sounds like deathcore to me. By association, maybe not. But definition? Clearly. Most of the colloquial deathcore scene is without any actual hardcore influence so if anything maybe these guys are legitimately "deathcore" as opposed to, y'know, bandwaggoners? IDK. What album should I check out first?