On Monday nights, Phantom, Spring Awakening, Chicago, and Amazing Grace are open. Of those shows, I would say that Spring Awakening would be my number one choice. Chicago and Phantom are great, too. Amazing Grace is supposed to be awful.
If you aren't talking about Monday nights exclusively, I'd try to get tickets for Hamilton. If not, The Book of Mormon, A Gentleman's Guide to Love & Murder, and Something Rotten are all very funny. If you're looking for a good old cry, I'd say Finding Neverland, Fun Home, Curious Incident, and Wicked are all amazing. I hope that was helpful!