[UPDATE] Yes, Cymande is not prog, but I tried to think of them as fusion in the msot conventional sense of the term. Neither is Badfinger, but I figured maybe in 1970 (January 9, 1970, to be exact, also stretching the parameters) any ambitious British album rock might have been called "progressive". Besides, the original reason I stretched this to include fusion was so I could put in this band, whose most obvious choice for this list I then passed on for some reason:
[UPDATE cont.] That brings me to one i clearly missed, since I was looking for floating blue skies, hand-drawn geomotric shapes, and the floating/flying setting, I missed the more obvious instances of kings, warriors, swords, power, fantasy, etc, that crop up in scenes from Return to Forever (who I kinda worshiped in high school) to Gentle Giant. Thank you to notrivia for pointing it out:
Back to the original list.
edit: + 1 Salsa album, via Harry Roman