Gardenias are my favorites for scent in a pretty shady location. Creeping rosemary is pretty good too. But thrives in a little more sun. Sweet violets do well here in our winters.
Do you have a Sunset western gardening book? I'm sure one will be available in your library. It breaks our
zones down even further and then also gives you options for shade, scents and things. It is my staple book. You might be able to find one in a used bookstore or a thrift store as well.