Ultimately you will want to cut it to fewer, not more, schools.
But that said, I agree with some of the suggestions above to check out some smaller schools, say some of the ones on that Biology PhD feeders list (per capita version).
Mainly I think that because as others pointed out, research opportunities and collaboration among the top students and faculty can often be very high among undergrads at such colleges, and that helps explain why they do so well in PhD placement.
They can also be very high on school spiritâin their own way. Like, maybe not football games with 100,000 fans, but more intimate competitive sports your friends might actually play, and lots of other traditions and activities and such that I would associate with strong school spirit.
If that sounds interesting, I would definitely check out Haverford. Very academicky school, short train ride into Philly, fun BiCo relationship with Bryn Mawr . . . seems like a potential fit.
Carleton is another school with really strong academics and it is in a very nice college town (Northfield), and also only like 45 minutes from the Twin Cities. Lots and lots of fun quirky traditions, spirited sports, and so on.
St Olaf, a forum favorite, is ALSO in Northfield (which itself helps explain why Northfield is such a nice college town). Again really strong life sciences, and both of these LACs have a real Minnesota Nice thing that might well be appealing to you.
Kalamazoo College is in a great college town (or really small city) of the same name, which it shares with Western Michigan University. Kalamazoo the city has lots of cool music and bars and restaurants and such, and is also a bit of a life sciences hub. There are actually trains from there to both Chicago and Detroit (it is basically right in the middle). The college is particularly strong in Bio and Chem, and also has a really cool curriculum approach, the K Plan, you might want to check out.
Finally, Oberlin is in a nice town just outside of Cleveland. A lot of people know of them for the conservatory, but they have also always been strong in sciences, not least life sciences. Some people describe it as a strong fit school, and I think there is something to that, but for kids where the fit is good it can be a great experience.
Thatâs just a few ideas, but point being I think academicky kids often benefit from at least taking a serious look at colleges like these, which are really much more focused on giving undergraduates specifically the sort of experience you seem to be looking for. And among other things, it works to get a relatively high percentage of them into grad programs.