I adore the instrumental dance "break" in All I've Ever Known from Hadestown. The lighting, the choreography, the violin - it gets me choked up even now.
I also think the staging for That Would Be Enough from Hamilton is pretty darn cool. After a rather non-stop show (pun intended), Eliza gets some time to just sit down with her husband and talk, and it's really beautiful.
Also, they never said this had to be a love song, so I'm going to put in when the wall closes on Elder Cunningham during You and Me (But Mostly Me) in The Book of Mormon. A hilarious way to literally "close" him out of the situation and put him in the background (which was actually an accident in rehearsals, I believe, but a very happy accident indeed).
"I think that when a movie says it was 'based on a true story,' oh, it happened - just with uglier people." - Peanut Walker, Shucked