Est, that list is fucken willfully obscure. Just happens to vaguely coincide with some of my interests, maybe more than most indie does, so I was seizing the opportunity.

There's also equally formally inventive music that doesn't really fit the list...
I don't think the SYR releases are that good. Sure, they're very difficult listening, so yep, they qualify, but I don't really understand what the pay-off is.
I think there's a bunch of fairly recent guitar experimentalists that deserve inclusion. Keith Rowe from AMM (on that list) has collaborated with (maybe?) all of these guys, so I think that's good grounds straight up.
Oren Ambarchi
Christian Fennesz
Rafael Toral
Jim O'Rourke (not thinking of his 2 rock records, the other 5 or 6 albums of his I've heard would all deserve mention for various reasons)
Scott Walker - for his haunted "chamber pop" albums since the 80s
Some of the freaky jazz-meets-primitive-electronics nutso shit coming out on the Rune Grammofon label ... eg.
Deathprod,
Alog.
Maybe
The Books, at least for the first album and also maybe
Zammuto's solo albums before that, particularly the rattling driftwood vibes of 'Willscher'.
Basic Channel (techno gets clogged with sand and murmurs away under the desert, occasionally coming up crackling and fizzing)
Oval /
Microstoria (think both acts have appropriately organic / sequencer-free vibes to them!)
Matmos... also Matthew Herbert when he's not doing house / pop, eg. as
Radioboy or
Wishmountain (I think both acts are pretty average, but taking musique concrete to the people in a relatively accessible format is kinda cool... and still, despite how that may sound, formally adventurous)
If we're including Coil, I think
Chris & Cosey / CTI should be on there too.
Arthur Russell? Can we slip some disco in? If not, his 'World of Echo', I suppose.
Loop - Like Evil My Bloody Valentine, maybe with no beards tho...
Main - The unsettling creaking and scraping of Loop's guitarist, throwing out song forms and ... well, the band, altogether.
Nuno Canavarro - weird Portuguese experimentalist from the 80s...
I actually think the
Animal Collective are really relevant too, but maybe only for their earlier stuff. That kind of noise/improv approach to electronics mixed with sorta primitivist leanings seems fitting. To me. Maybe. OK, fuck you.

I dunno about 'Loveless', I love it, but I think it's too blissed out for the list. Likewise Cocteaus and This Mortal Coil. AND I AM SO SERIOUS ABOUT THIS I WILL FIGHT ANYONE WHO QUESTIONS ME. Or not at all.