I HUGELY disagree with your intentions. It all depends on your view of "uncommercial".
On that note, I would also like to add Coil's "ANS", which is a 3 hour or so drone album.
the thread is asking for the most uncommercial albums...a black metal album by a black metal band is directed at a certain audience; therefore, maybe not as much as a radiohead record, it still is commercial. could i make myseld clear this time?
here's another:
![B000005S37.01._SCLZZZZZZZ_AA240_.jpg](/proxy.php?image=http%3A%2F%2Fec1.images-amazon.com%2Fimages%2FP%2FB000005S37.01._SCLZZZZZZZ_AA240_.jpg&hash=2b46f98657507153d7ec591b885a7200)