Gasp - Drome Triler of the Puzzle Zoo People (1998)
Gasp are true crucial heroes. They're one of those hyper underground bands that has experienced somewhat of a resurgence of popularity on the internet (think Demilich or something like that). They were signed to Slap a Ham back in the day so they naturally got mad cred for that, but they seem to be one of those bands that never got the appreciation they deserved.
Honestly by the late 90's the Powerviolence scene had started to breakdown in a big way. Everything had kind of reached it's limit. The whole Crossed Out worship sound had kind of worn out it's welcome by this point. Gasp however took the sound to new places. They stretched the blueprint to the breaking point and shattered all expectations.
Drome Triler of the Puzzle People has the basic fast/slow/fast structure that is the building block of the whole Powerviolence ethos, but they basically threw out the whole standard playbook. Here you've got noise and drone sections. There you've got shoegazing. And over here you've got borderline screamo sections. However at the end of the day they never forget the bottom line, which is power violence brutality. Despite the albums variety it all eventually reels itself into one coherent entity.