Of recent shows, I agree about TUCK EVERLASTING. Maybe not "most" but definitely didn't get it's due. I adored the ending ballet sequence detailing Winnie's life. Plus, I adore Carolee and always love seeing her perform. Just a sweet little show that I'm sure will have a long regional life.
Beyond recents, I would say PARADE. I never saw the Broadway production, only a few regionals. This show has really touched me, and I'm neither Jewish nor Southern, but I'm always moved when I listen to the recording.