What I’d have loved to see:
The original My Fair Lady and Camelot. (One aspect of their original staging included the curtain closing for scene changes, while short scenes took place in front. The touring company of Camelot I saw in 1963 had a marvelous interactive march of banner bearers, during the scene change, who then climbed up to stand and hold their banners from the upper galleries of the throne room. Very grand.)
Goldilocks - Because I love the score and the funny book. I bet it would work with Sutton Foster and Hugh Jackman.
The original Private Lives, Lady in the Dark, and, of course, Glass Menagerie. The Cherry Jones Heiress. The original Candide, which, though overstuffed with fancy Baroque sets and costumes, was really a serious show, not like the mundane, anything-for-a-laugh later Prince revival.
Though I love the score of the original Carrie, I’ve seen enough of the press reels to see that the outlandish design and staging likewise worked against it.
Curiously, I wonder if the reputation of the original production of Streetcar has engendered unrealistic expectations of what it was actually like. Though the appearance and behavior of Brando as Stanley was a shock to original audiences, I doubt he would have the same effect on us, after 75 years of social change. To contemporaries, wearing a t-shirt was looking almost naked. It was underwear. Brando actually popularized t-shirts. The underlying original effect means nothing to us now, when no doubt many of us would be watching this while wearing t-shirts. Also, Brando’s behavior might now just seem like overacting. The origin of change may not seem as effective after later decades of imitation and development.
Lastly, I’d love to see one of those stage spectacles from the 1920’s, like The Bluebird, or Max Reinhardt’’s The Miracle, for which set and costume designer Norman Bel Geddes transformed the entire interior of the theater into a huge cathedral. My mother saw both of these, and described amazing lighting and design effects. No one does anything like that anymore.