Admission with FA is very, very competitive. You should look for schools with large endowments which are more likely to offer FA packages. For essays, I would write about your passion for tennis, your relationship with your dad and science, and how you want to become a mature person and change maker after your graduate, etc. Show your passion during the interviews, and you will be fine. Also, around NYC, you should look at Blair and perhaps Peddie. All schools on your list are very good but the reality is that they are super difficult to get in. Good luck!