I like planting with native plants, which are hardy and once established, very low maintenance because they are adapted to your conditions. The local wildlife is adapted to them, so the native plants will be much more likely to be attractive to birds, butterflies, etc.
You are in Louisiana, right? Bearded iris should be all right for you, though not native, but you need to check cultivars of daylilies carefully, many of them need more chilling time for dormancy than you probably have and peonies almost definitely will not do well for you because they grow best in a climate with true winter, for a winter dormancy period.
Native perennials that should do well for you include: yarrow, anemone, milkweed/ butterfly weed, coreopsis, evening rain lily, purple coneflower, scarlet pea/ Texas indigo, blazing star/ gayfeather, bee balm, evening primrose/ sundrops, black or brown eyed susans, salvia, golden rod (but it can be an aggressive spreader in the garden).
If you like the look of daylilies, you have a southern adapted native whose beautiful flowers look a lot like daylilies. It variously goes by puccoon, gromwell, narrow leaf stone seed.
Plant a mixture of these, and sit back and watch them thrive and all the butterflies, hummingbirds, etc come to them.