I too think your top choice should be "Jerry Springer: The Opera". The subject matter may make you cringe (like it did I), but the score, book, and lyrics are most excellent. It is packed full of great tunes also.
"The Woman in White" and "Mary Poppins" would be my 2nd and 3rd choices.
"What the hell happened to you? You look like a Make-A-Wish Kid. You know, I just knew you were gonna bring shame on this new family of ours, and it just figures you had to go make yourself over into some heroin-shootin skate board chic on the only day E! could interview you!" - Cherry Cherry, on her daughter Mary Cherry