I think
"A Song for All Seasons" is the best Renaissance album, especially the very dramatic 11 minute title track, but I probably wouldn't have recommended them to you anyway! And on second thoughts, as much as I love the Moraz album, I think you'd probably prefer something a bit more guitary so thought of Mostly Autumn who are probably about as close to proper prog as anyone else nowadays and who I've seen live more times than any other band during the last 20 years so try this and if you like it, I'll put a compilation of tracks from the 20 or so CDs I have by them in a folder and email you a Dropbox link.