My husband and I just saw Wicked and thought it was great. Today it occurred to me that Judy Garland (when she was older than Dorothy-age, obviously) would have been a terrific Elphaba. Can you imagine her singing “Defying Gravity”?
My husband says Robert Preston would have been a good Wizard in this show, with maybe Vera Ellen or Shirley Jones as Glinda. (Ethel Merman for Madame Morrible?)
Robert Preston would indeed have been ideal as the Wizard. Don’t think I agree about Judy Garland, though – Elphaba, despite being green, has to knock your eye out, and Judy, for all her pipes, just wasn’t that.
Thinking back on all the musicals I’ve seen, I can’t really think of anyone who regularly sang in the belting style that sort of defines Elphaba’s role. Judy Garland is probably the closest, but still not right. Looks-wise, Cyd Charisse or Ann Miller might be closer than Garland, but Miller’s voice isn’t right either, and Charisse didn’t sing.
I do agree that Robert Preston would have been a great Wizard.
In-universe, you cast Jean Hagen with Debbie Reynolds singing behind the scenes (and behind a curtain at one point), but in real life, you cast Jean Hagen and Debbie Reynolds, with Jean singing for Debbie, who is pretending to sing for Jean.