There are some smaller schools - not under-2K-tiny but under 3K - that could be well worth considering. Keep in mind that a college of 2000-something undergrads who are all highly qualified is not the same feeling as a high school of 2000-ish, of whom only a minority are highly academic.
Denison U seems to fit your parameters well. Suburban, just outside Columbus OH (which is a state capital). Particularly strong in social sciences, with a very strong DC semester/internship program Lugar Program | Denison University (not just the availability of a DC semester hosted by another entity, as you’ll find at most schools). Strong both in the social sciences themselves, and in crossover areas like Data Analytics which can add significant strength to a social sciences resume. Definitely a fun and friendly campus, and more diverse than most peer schools. Greek life is present but not overwhelming. Full-need-met financial aid.
Clark U, in Worcester MA, could be worth a look as well. Like Denison, it’s on the smaller side but not tiny (over 2K undergrads). In a small city, with access to a larger one (45 minutes on commuter rail to Boston). Cross-registration with other Worcester schools, including Holy Cross and WPI. Good internship placement, and a range of accelerated BA/MA programs with full or partial tuition scholarships available for the 5th year. Clark doesn’t guarantee full-need-met aid, but is likely to fill any gap with merit.
Dickinson in PA meets full need, is strong in social sciences, and seems to fit the vibe you’re looking for. It’s also on the smaller side and suburban, half an hour from the PA state capital of Harrisburg.