That's kind of a tough question to answer because those shows are what shaped modern theatre. Or, assuming that you only mean if I were to pick one show out of the golden era and have it be released now...than I think it would depend. Even with Hamilton, something like My Fair Lady would probably win, that's not a fair comparison though, is it? Considering that My Fair Lady is often considered the best musical ever made. However, something like Oklahoma! probably wouldn't... Cabaret's original version might beat Hamilton, but I'm very bias because I adore Cabaret. Then again you could argue that they wouldn't win, i.e. An American in Paris didn't win. By the way, I consider the golden age to be the 1943-1969, I mean with Cabaret, Fiddler, and Dolly, why not? You also have to consider that audiences and critics have changed...