So, you’re attending a selective prep school that’s known for its academic performance and sends students abroad regularly. You’re in a very good position academically.
Truman state would be a safety and could be affordable.
Colleges like Muhlenberg, St Olaf, Dickinson, Denison, are smaller than your optimal size but meet need for those they admit. Dickinson is very international, St Olaf and Denison also to a certain extent. They’d all be matches.