They have Ariza, Porter, Webster, Childress, Singleton, and Vesely all of which can play some SF. I don't see Wallace or Green as being significant clear upgrades worth giving up Okafor for especially if you are talking about including a first round pick.
I think you could make some moves with them and I think Bradley would be a bigger need for them, but I'm not sure there is a trade there that makes sense for both teams.