Definitially Tuck Everlasting! The cast, music, it was all amazing! Other than that, I think [Title of Show] closed pretty quickly and was not given enough appreciation.
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.
Without a doubt Great Comet. This show is truly a revelation for Broadway, original in all the ways Hamilton was painted to be (but it isn't just a colonial rip off of another show). The drama and controversy was unwarranted and a truly brilliant piece of theater should have had a much longer life.