Every year I plant a row of marigold along the ends of most of the garden beds. They are supposed to be good for bug repellent and as a pollen source for beneficial insects but I also just love how pretty they are. My favorites for this are tall French marigolds. These aren't commonly available but Nichols Garden Nursery has several varieties.
One of my favorites is Frances Hoffman's Choice. These grow up to 40" tall and are great in bouquets as well as garden decoration. Bred by plant breeder Alan Kapuler they were named after plantswoman Frances Hoffman who said they were her favorite. Mine, too.