Inferi is definitely my favorite! Insanely technical, while also melodic. Their songs never feel old, never like they're recycling anything, and just always show true musicianship.
Job for a cowboy, the black dahlia murder, infant annihilator, and cattle decapitation are all also great!
If you're into metal core, maybe check out unearth with songs like "giles" and "zombie autopilot"