I limited myself to shows I actually saw. I didn't see Hamilton, Dogfight, Heathers, Violet, Bridges, Hedwig, etc. In no particular order...
Original Shows
Waitress, Natasha, Pierre, and the Great Comet of 1812, Shuffle Along, War Paint, If/Then, Doctor Zhivago, Fun Home
Revivals
The Color Purple (Cynthia Errivo), My Fair Lady (Laura Benanti), Oklahoma!, Hello, Dolly!, Once on This Island, The King and I, A Little Night Music
Off Broadway- Original
Daddy Long Legs, Hadestown, The Band's Visit, Bella: An American Tall Tale, A Strange Loop, First Daughter Suite, Pondling, Futurity, Sell/Buy/Date, Company XIV Cinderella
Off Broadway- Revival
Little Shop of Horrors (Gyllenhaal, Ellen Greene), On A Clear Day You Can See Forever (Irish Rep), Do I Hear a Waltz, The Marvelous Wonderettes, The Robber Bridegroom, The Secret Garden (concert), Brigadoon, A Midsummer Night's Dream (SITP), Fiddler on the Roof (Yiddish)
Cutting it all the way down to a top 10: Waitress, Great Comet, My Fair Lady (Laura Benanti), The Color Purple (Cynthia Errivo), A Little Night Music, The King and I, On A Clear Day You Can See Forever (Irish Rep), Bella: An American Tall Tale, Daddy Long Legs... and honestly I think I prefer the shows I mainly know through the cast album/clips to anything else I could add to this list. This decade has featured a lot of great theatrical moments but not great shows in my opinion.