Let's talk about both progressive and non-progressive bands you thought we're gonna be big and/or influencial, yet they never actually delivered, leaving us with frustrating brilliant albums, that remain for the large part undiscovered by the big(ger) audience.
I know a lot of examples, but let me start with two:
The Standard
Now a band in constant hiatus, among their five albums, four of them I regard as masterpieces. They occupy a space between new prog and Pitchfork-liked indieprog like The National and Grizzly Bear, yet they are much more radio-friendly. Can't understand why this band isn't playing stadiums and selling tons of albums. Here's a track from "Wire Post From Wire":
Magyar Posse
Possibly the best postrock-bands I ever heard of. Their sound has some Ennio Morricone-influences within them. Their three albums are each masterpieces and quite difficult to obtain. Here's a track:
And this is probably their signature tune, and their best known song (relatively speaking):
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