This is fun!
I have to go with some of the classics...
With one small exception, and it's totally a personal issue with it, I feel that GYPSY is a perfect musical...the exception:the ending. I think the show should end after Rose's Turn. Historically, it's more accurate and I think the way the ending is written now is a bit of a cop out.
Also: WEST SIDE STORY...it's just brilliant, as well as Porgy and Bess-SO beautiful.
I feel like the responsibility of making a perfect musical belongs to the writers and those who originally develop the show and I don't feel it's a judgement that can be made until the show has had the opportunity to stand the test of time somewhat.
my reasoning: I think a perfect show should be director/actor-proof. Meaning that even a production in the middle of Wisconsin starring third graders can still be produced effectively, story in tact. I think some of the picks here have not really proven director-proof.
just my opinion I guess.
"There is nothing scary about life, if you are not attached to the results." - Conversations With God