I'd like to feature my Fances' Choice marigold. The unexpected feature about it is it's fantastic size! Last year, we had nearly perfect weather with a half inch of rain a week all season, and these got about 5-6 feet wide, and nearly again as tall. This is your opportunity to grow a marigold hedgerow. They look great against a fence, which helps to hold them up. If they get blown down, that will not stop them. And the foliage turns a deep purple in autumn, which really makes their flame-colored blossoms pop.
Next up is the multipurposed Chrysanthemum, Primrose Gem. It's a great flower in its own right, and also serves as a vegetable. You can pick the tip six inches of budding growth for use in ramens and soups, in salads, as a flavorful herb in sushi, cooked as you would spinach, or as a side dish like hot pot or the Korean namul dish. Also a good substitute for folks who do not like the taste of kale, collards, or mustard greens, as this has more of a fresh and cleaner flavor without bitterness. Would be a great addition to a food forest or permaculture system.
And I would be remiss if I did not feature a few showy natives. American Bellflower is a blue spiking campanula very popular with bumblebees and it is perfectly happy in the shade or part shade. It gets about 3 feet high but has a very small footprint, so would be great for adding vertical focal points behind your hosta, ferns and lily of the valley. It has a long bloom period from June to September, and will keep producing a few blossoms till frost.
And for surprisingly showy natives, go for the Missouri Evening Primrose. This is very different from the common evening primrose you see spiking on roadsides. My mom loves this plant so much she sniped its seeds after years of admiring it in in a public garden and figuring out what it was. She now has it as a creeping groundcover in her big native bed while bigger things get established. It only gets a foot high and doesn't get out of control. It has numerous huge 4-5 inch butter yellow blossoms that open after the heat of the day is passed. It produces a lot of pollen for insects. When it matures, it has streaks of hot pink on the stems that contrast nicely with the blossom color. This is a prairie native with a large range, from TX to ND and everywhere east, and does not mind dry conditions or hard winters. The unexpected feature of this plant are its starfruit-shaped pods, which normally would pinwheel across the native landscape in winter winds, but also make cool decorations for fall crafts or wreathmaking. If you like taking moonlit walks in the garden, this one practically glows as a flower of the night.