I gots metalcore for you. I'm always happy to show people that there was a time when metalcore was a thing worth listening to. Mostly during the 90s, when it was more of a punk movement of bands mixing hardcore/post-hardcore with thrash, death metal, and grindcore. When the Massachusetts bands, like Killswitch Engage and Shadows Fall, started incorporating "emo" and melodic death metal is when the genre started going down the tubes, and the current stereotype which dominates people's minds began. But metalcore is so much more than the Hot Topic bands.
Familiar with Converge? But for the moment...
Snapcase -
Progression through Unlearning