I think you could get some use our of some of the discussions on how to plant dams. Here's a couple from permies
https://permies.com/t/17253/planting-dam ,
https://permies.com/t/38129/Dam-Plants
Scanning through those, it looks like you'll need to be aiming for shallow rooted plants. The second thread specifically suggests tap roots are a bad idea, least on the water holding side. That would rule out amaranth and sunflowers. I think ginger is perfectly find, if it can survive in your zone. I think it's already borderline in sheltered locations in my zone 8b location.
You might also look at this link
https://permies.com/t/21237/Temperate-edible-plants-wet-places for more plant suggestions. They include a link to a good article from Plants for a Future. If you're not familiar with PFAF, it's a huge searchable database, that is trying to compile together all known useful plants. You can refine the search down by a wide number of varying growing and use characteristics to give you a surprisingly long list of plant options.