Math through calculus (do not try to go faster - deeper and thorough is the key here), bio/chem/physics honors + AP Chem and AP bio if possible.
I agree wrt public speaking. Don’t skimp on English in general. In college, for your gen eds, try to take philosophy and bioethics, public speaking/intercultural communication/interpersonal communication.
HS or college world history, foreign languages, anthropology - anything that exposes you to other ways of speaking/thinking.
Spend time in hospitals, clinics, food banks, churches that serve refugees: you need to get used to helping people different from yourself, people in pain, people who may not speak English well. Shadow doctors, nurses, PAs. At the HS level, you only need a variety of experiences.
Try to have a positive impact for one group you’ve been volunteering for.