Mine was either Hello Dolly or Funny Girl, which opened within months of each other. I am guessing HD, because I can remember turning up the volume for the title number and Sunday Clothes, and having my mother shout that it was too loud. My parents had albums of at least MFL, South Pacific, Camelot, and TKAI, which I occasionally heard, but made no effort to actually play them myself.
Now I would be more likely to listen to TKAI than any of them. When my mind rambles, one of the things I have been known to do is evaluate which score I think is the best ever, and I always seem to conclude on TKAI.