Rolling Stone just released the list:
http://www.rollingstone.com/music/lists/50-greatest-prog-rock-albums-of-all-time-20150617Harmonium made number 35 so we've learn some more about them on the news. I learned that in the 80s Quebec paid them a tour in California to act as national cultural ambassadors. Might have worked given how many deals with have with Cali now.
Here's one of their greatest hits:
Feel free to post your favourites from the list.