As an ex-graduate-school interviewer, I'd say your first thought, though very scary indeed, may be the best - no scent. Because someone on the panel may be allergic to scent, feel uncomfortable, and decide they would rather not have a perfumed person around them in the future! Whereas, once you're in, you can wear whatever you like.
But if you do go ahead and wear some, I'd suggest something very light and citrussy. Vintage Ma Griffe comes to mind, don't know what the equivalent would be today, though.