I've listened to almost all of Crumer's material from the beginning until the stuff right before Let There Be Crumer and I still feel like Ottoman Black has never been topped. at times his shorter tapes remind me of the best of Pedestrian Deposit; super cut-up and harsh noise with a personal twist. I still really dig Walk With Me even though it's got a super slow buildup. the last track on that one, Pining is like a 9 minute harsh noise money-shot.
but I think what makes Ottoman Black so special, at least to me, is that the artwork, track titles and music itself all come together to create a tight, if somewhat opaque narrative that just elevates the whole proceeding. I know people say only the music matters and whatever, but Ottoman Black is the complete package: art, words, sounds. it's not just really well done harsh noise, it's more than that.