Actually, I’d say that refining your list represents what is most important right now. You have done what is needed to get into a high quality college for the study of CS, physics and chemistry. If you choose a variety of desirable schools for this, it’s likely that you will see acceptances at several of them.
I’ll add the opinion that you may be best suited to schools at which it would not be necessary to declare a major until late in your sophomore year, and at which the opportunities for adding a second major or a minor would be straightforward and commonly pursued. At some colleges the vast majority of students either double major or major and minor, for example.