Not sure what your situation is or the ranges/styles but here are a few that may could be reconfigured:
Don't Follow in my Footsteps from The Goodbye Girl
The Apple Doesn't Fall from The Rink
A Boy Like That/I Have A Love from West Side Story
We Make A Beautiful Pair from Shenandoah
If anyone ever tells you that you put too much Parmesan cheese on your pasta, stop talking to them. You don't need that kind of negativity in your life.