I just got into Swans. Their albums "To be kind" or "Glowing man" are great, and it reminded me of "20 Jazz Junk Greats" by Throbbing Gristle. I wonder how many great experimental albums are there?
It's hard because of the subject matter but also the length. It takes about 6 hours and to really appreciate it you need to listen to it in one sitting.
It's quite similar to Yes Sir, I Will but more angry and noisy if possible. I think it came about after the sexual assault of a friend and the lyrics are heavily based on that experience.