I highly recommend American Lotus (Nelumbo lutea) which would do well in the shallower areas of your pond.

At the pond edge I would recommend various native irises. Some that are native to your region include Iris tridentata (a totally awesome and completely under utilized iris that is one of the latest of all iris species to bloom in the summer), Iris virginica, and any/all of the Louisiana species such as Iris fulva, Iris hexagona, and Iris giganticaerulea.

If you buy seeds, bear in mind most of these will take 2-3 years to bloom. (At least that the case for me in Ohio.)

Here is a link that might be useful: Native Iris Species Website

Oh, I forgot a whole slew of others you should consider such as Lobelia cardinalis, Lobelia siphilitica, Mimulus ringens, Mimulus alatus, Hymenocallis caroliniana, Physostegia viriniana, Chelone glabra, Chelone lyonii, Helianthus giganteus, Bidens coronata. You could turn that pond edge into a butterfly haven!

badbear: I too am populating a pond/bog. Do you know where I can get Nelumbo lutea (ordinary yellow one)?

Only seeds I have at this time for edges of ponds are native mallow species. Nothing aqautic. In summer I should have some bog plant seeds of carnivorous plants Sundews.