Eastern Oregon groove metal and metalcore band from La Grande fusing down-tuned, rhythmically punishing riffs with metalcore aggression.

Cave In formed in Methuen, Massachusetts in 1995, beginning as a metalcore act before undergoing one of the more dramatic stylistic evolutions in underground heavy music, shifting from the technical aggression of Until Your Heart Stops (1998) to the sprawling space-rock of Jupiter (2000). They signed to RCA Records and released the alternative rock-oriented Antenna in 2003, then went on hiatus in 2006 before reforming in 2009 and returning to heavier territory. The band remains active and is regarded as a key bridge between hardcore, progressive rock, and post-metal.

Central Disorder is a melodic death metal and metalcore band from Crestwood, Illinois, blending the hooky, Gothenburg-influenced melodic sensibility of melodic death metal with the breakdown-driven intensity of American metalcore.

Metalcore and thrash metal band from Charleston, South Carolina, blending the aggressive riffing and breakdowns of metalcore with the driving rhythms of old-school thrash.

Providence, Rhode Island band operating at the intersection of death metal, grindcore, and metalcore, combining aggressive blasting extremity with metalcore's rhythmic drive.

Chaerea is a metalcore band from Providence, Rhode Island, crafting heavy, riff-driven material that sits within the heavier end of the metalcore spectrum. Their name references the Roman soldier Cassius Chaerea, suggesting a confrontational, historically aware approach.

Chapter is a metalcore band from Greensburg, Pennsylvania, operating in the tradition of the Pittsburgh-area heavy music scene. The band plays aggressive metalcore and has released material independently.

Fox Lake, Illinois act Children of Dismay combines metalcore's rhythmic breakdowns with thrash metal's relentless aggression, landing them firmly in the heavier end of the Midwest scene. Their style is abrasive and energetic, built for live punishment.

Cleveland's Chimaira was one of the defining acts of the early 2000s heavy music scene, bridging the gap between metalcore, groove, and nu-metal with a raw ferocity that earned them a devoted following. Albums like 'Pass Out of Existence' and 'The Impossibility of Reason' cemented their place in the era's canon.