Answer: Here's a variety of fragrant perennials in no particular order. I suggest going to some nurseries on a regular basis and sniffing plants! Calamint, Daphne, Pinks, Daylilies, Lavender, Lilies, Bee Balm, Peonies, Summer Phlox, roses, scented geraniums (Not the same as the typical red Martha Washington geraniums. These have scented foliage.), Salvias, jasmine, and honeysuckle vines. Don't forget sweet peas. Although they're an annual, they self sow and there's nothing sweeter! Nicotiana and stock are two more sweet annuals.
Q&A Library Searching Tips