Angels in America, Part I. There is nothing salacious about the full frontal scene, because it takes place as part of the medical exam of a very sick patient.
I recently saw a play called "Annapurna." The male lead is naked, but the audience only sees his butt. I don't think this play has been on Broadway.
Audrey
Audrey, the Phantom Phanatic, who nonetheless would rather be Jean Valjean, who knew how to make lemonade out of lemons.