Wow! So many good picks. Probably most of them are in my top ten, so I'll just add:
The Fibonaccis - Purple Haze (not quite prog, but the band was)
Strawbs - Benedictus
Genesis - Selling England by the Pound
King Crimson - The Sailor's Tale
Traffic - Hole in My Shoe
Idle Race - Skeleton and the Roundabout
Bookmarks