An instrument one does not readily associate with prog, yet B.J. Cole - a very important session man (along with his namesake Jerry Cole) - appears on many a prog/fusion lp (Parsons,Uriah Heep,Gilmour,Procol Harum, to name a few.
As something like "Going For The One" attests, you would not think so, but pedal steel goes well with prog.
Today, for the first time, I listened to Cole's first solo lp, "The New Hovering Dog" ('77??). I heard that his solo lps are not at all country but more experimental. And so is the case - only one (short) hillbilly-boogie-type track on this wonderful lp. Unique-sounding lp not far from prog with unusual, distinctive vocals, Mike Giles on drums, Tristram Fry on percussion,Monkman on harpsichord,Danny Thompson on string bass,etc. Cole does vocals,synth,dobro cheng & steel guitar. Recommended. Not that its easy to find.
So then, some examples of steel guitar in prog or fusion....