Shellac- At Action Park (1994)

Shellac is post-harcore/ math rock from Chicago, formed in 1992 that conciders themselves “minimalist rock trio”, which I would call them minimalist post-harcore, I’m not really seeing the math rock part because of the drums.
Whatever genre label one wishes to attach this is a band that has been around for twenty years and doubtlessly will still be listened to twenty years from now. This is a band that has a talent and quality that is well ahead of the time, but just as obviously a product of its time with a balance between minimalistic riffs and slowed-down hardcore.
(This is another recent discovery for myself via the wonders of the Wiki and YouTube)