Cork screw willow. They love the wet soil here. My brother has had great success with the ones he uses in his yard for the wet areas. Just a suggestion. On the plus side, they are very easy to propagate on your own. Just cut a peice off and plant it. They grow very well. Maybe you grow a few a sell them.
Purple leaf plums are a temporary purple tree that will not do well in wet soil or standing water. They have serious pest and disease issues as well as weak branching, and everybody in NJ loves them. Whenever I am brought to a jobsite that has purple leaf plums, I explain to the client the faults and temporary nature of this plant and try to have it removed immediately, because it's going to be dead soon anyway. Most here will live around 15 years before they meet the chainsaw.