In 1968, I was a young sailor stationed on board a U.S. Navy ship in Scotland. One weekend, I went down to London to see "Cabaret" starring Judi Dench (as Sally Bowles) and Lila Kedrova (as Frau Schneider). I will never forget the impact that the song "What Would You Do?", sung by Miss Kedrova, had on me. Half a century later, perhaps because I am older and the lyrics have more personal meaning, the song still packs an emotional wallop every time I listen to it. Definitely my favorite song in musical theatre.
Here, from the cast recording, is Miss Kedrova's version of "What Would You Do?".
One song which I find is sadly underrated/unknown is "How Many Devils" from the "Civil War "concept album. About the horrors of war, switching POVs between Confederate and Union soldiers.