Is your son a 4.0 student because he's taking easy courses at an easy school? Or his he happy working on schoolwork as hard as he is on baseball?
If the former, I think Adbono's advice if good. If the latter, I would target strong academic schools, in and out of P5, where the kid could be happy if baseball doesn't work out or if he gets limited playing time. Like Rice, the service academies, the whole Patriot league, Davidson, Duke, Notre Dame, Michigan, UNC, UVA, Maryland, etc.