We are also IL residents who don’t qualify for need based awards. In addition to all the schools mentioned above, I suggest the following as well:
University of Pittsburgh- probable full tuition scholarship/possible full ride
Temple University- probable full tuition scholarship including 4K stipend for travel abroad
University of Texas-Dallas - possible full ride including stipend for travel abroad
University of Iowa - qualifies for 20k/year Presidential scholarship
FSU- qualifies for out of state tuition waiver
Good luck to your DS. He will most likely have some excellent choices for merit aid based on his outstanding stats.