The band are perhaps best known for their varying screamed vocal styles, dadaist lyrical content, and noisy, synth-infused, non-stop beat-your-head-against-the-wall grindcore, all while somehow managing to be at least a little catchy.
Several members of New Found Glory have long been involved in hardcore side-projects, but kept NFG around presumably to make a living. The band's never so much as hinted at a hardcore background, but here they mix these sounds to surprising effect.
There are few bands who can play as technical of music while still being able to write even halfway decent vocal melodies, never mind the truly top-notch vocal melodies (and harmonies!) contained herein.
Before Rage Against the Machine, Zack de la Rocha was raging in a legitimate metallic hardcore band Inside Out. One of the progenitors of this mixture of genres, in fact.
Japan’s Sigh are truly in a league of their own. Sigh’s In Somniphobia is one of the wildest metal albums in existence, possibly only topped by Sigh's own Imaginary Sonicscape.
Asschapel were an American band from Nashville, Tennessee – an aberrant, unholy mix between hardcore punk and black metal, with a level of heaviness atypical to both.