Shasta daisy is very aggressive, and I am not sure that it is a native(might be) Coreopsis is native and let's say, enthusiastic. Ox eye daisies seed merrily, but unwanted plants can easily be yanked

based on my experience at my property the top choices to introduce in order to establish a population by interseed with grasses would be
brown eyed susan,
black eyed susan
purple coneflower
shasta daisy
plains coreopsis
tickseed coreopsis
gray headed coneflower
ox eye daisy
bee balm
new england aster
partridge pea

Shasta Daisy is not native, and neither is ox-eye daisy. I find shastas to be unacceptably invasive and hard to remove. Ox-eye's not so much. April

Make sure Ox-Eye or Shasta Daisy are not listed with your county extention office as noxious weeds.

Vera

Blue lobelia appeared this summer in two wet locations that went wild when I had to stop gardening for a while. I also planted red cardinal flower plants in some higher ground. My cardinal flowers did not do well when they dried out so I had to water them. I hope they are aggressive as they are so brilliant in color. Last year, they were tidy little stalks, so this summer will be the test. They do seem to need a good water supply. Good luck on your plantings. I have been following your posts. You have a wonderful project for yourself