I am way late to this thread. First, I hate nearly all of the bands that are appropriately listed in this thread in the first 5 pages (other than the true classic hardcore bands - Bryan the answer is Black Flag, but only the Keith Morris version. I love punk and the classic punk bands on here - but they don't quite belong... the last two pages have gone down that past, but that's Ok with me since I love the Misfits, Descendents, etc), but in the early and mid 90's I listened to a bunch of stuff that might qualify as noise or post-harcore, except it was played by dudes that wore jeans and t-shirts and did not dress in leather or wear make up (which could easily describe The Cure or Poison - both of whom I love). In the late 90's/early 00's I was moving into more pop, indie and alt-country areas. So the whole Alternative Press bands from 2002-2007 make my skin crawl.
ANYWAY, I hesitate to associate the following bands with some of the shit in here, but I think some of you will actually like it, so in the spirit of sharing... these probably qualify more as noise/math/acid punk:
And because no one has gone there: