I agree with the poster(s) above who recommend that you be patient and perhaps a #1 choice will emerge. My daughter–now a HS senior–was struggling with this issue in the spring. There were about a half-dozen schools that she loved and where she felt she’d thrive. But between, say, March and June, a top choice gradually emerged just by thinking deeply about each school on her list. Visiting a second time solidified it. Sometimes my daughter questions whether this school will be the BEST school for her, but we tell her that as long as she believes she would fit in, be challenged but not overwhelmed, and be happy, she can’t go wrong.
Give it time. Perhaps there is one thing about one of the four schools that will make the difference. Minds are always working.