Ideas for Permacultural Farm Border?

Hello! I work on a small organic operation close to a river in the Pacific Northwest. We are brainstorming creating a permaculture-inspired border of perennials to mitigate on-farm runoff into the river. We want to incorporate some chop-and-drop-friendly plants and pollinator-friendly plants. We’re interested in relatively small shrubs so as to not shade the field. Any fun ideas of things you’ve done for borders? Some ideas I have so far are borage, comfrey, and pigeon pea. Thanks in advance!