Miss Saigon can be underrated sometimes, there's so much more to that wonderful musical than simply being "that helicopter musical."
"If there was a Mount Rushmore for Broadway scores, "West Side Story" would be front and center. It snaps, it crackles it pops! It surges with a roar, its energy and sheer life undiminished by the years" - NYPost reviewer Elisabeth Vincentelli
I seriously loved the scarlet pimpernel, I think it was reight before all the re-workings and I laughed my ass off the whole time. and the music may not be great by musical standards but most of it was good.
There are some excellent choices cited above, but, having seen it at Goodspeed in Chester on Sunday afternoon, I would like to add another vote for "Amour." Legrand's score is certainly a hidden treasure, and the Goodspeed production, ideally cast, is immensely enjoyable.
Caroline or Change Wonderful Town (Murphy) "Bernie's" Gypsy (I'm always amazed when someone says they didn't like that...I really thought that that production captured the true essence of the show).
I will add: Song and Dance (from the 80's).
AND....one of the best Off-B'way shows ever, from about 10 years ago. Me and Jezebel. It was a true story about a woman who let Bette Davis into her home to stay for a couple of days and then the family couldn't get rid of her and " Miss Davis" ended up staying for weeks..it was hilarious! and no one saw it..