Though Michael John LaChiusa, Jason Robert Brown, and Stephen Sondheim have written some wonderful scores each (BOMC notwithstanding) I would not recommend that you perform anything written by them for an audition as their accompaniments are notoriously difficult, which may be a problem if you don't want the piano to be botched. I would recommend ROAR OF THE GREASEPAINT, SMELL OF THE CROWD, I DO! I DO!, SEESAW, MY FAVORITE YEAR, or LOVE STORY
Also if you want to be super indie, you should sing something from this really obscure show called WICKED. Nobody knows any of the music, but it sure is good.
Anything regarding shows stated by this account is an attempt to convey opinion and not fact.