"The lead in hand to God would be extremely demanding since you basically play two parts and have to switch between them at the drop of a hat. "
"If we're going by roles written particularly for someone to star in, both If/Then and Phantom come to mind, with Elizabeth for Idina Menzel and Christine for Sarah Brightman, respectively.
"
Elizabeth of IF/THEN covers both (or all) definitions going on in this thread.
It was written around Menzel, and it's an extremely demanding role where she's on stage the entire time except for a couple songs, playing two roles where she has to "switch between them at the drop of a hat" (or glasses). One can even argue that the show needs a star to carry it, precisely because it was written around Menzel as the headliner to begin with. (Whether the show can stand on its own while on tour remains to be seen.)
#BoycottTrumplikePattiMurin