An old gardening friend who used to have a nursery had Holy Basil plants on either side of the entrance, and said everyone wanted to buy it once they realized where the heavenly fragrance was coming from. I've grown it here, and though my sense of smell is not terribly reliable, I could definitely smell it—delicious! To me, it smells like basil meets juicy fruit gum, but way better than that sounds. Moonflowers, Evening Primrose, Flowering Tobacco, Sweet Almond Verbena and four-o'clocks also smell great, IMHO.
Heliotrope, Mignonette, sweet peas and night-scented stocks may or may not be suitable for warm-climate gardens, but are known as excellent plants for fragrance. I've tried growing scented geraniums that were given to me by a TX gardener, but I don't have the knack (or climate?) for keeping them alive.
Some of the most fragrant plants are night-bloomers trying to attract moths, so think a bit about what times of day people will be visiting your house.
