You are about as strong a candidate as one could be, without having a “hook” or a “spike”. I’m assuming that you didn’t apply ED/EA at either of the schools where you’re a legacy (this would have been your best bet). At this point, it’s a crap shoot for you. I don’t know whether legacy status helps in the regular decision round at Princeton and Yale. You are likely to be accepted at USC, Emory, and BU, but I don’t know that you’d get merit at BU (although you certainly “merit” it). It’s really unfortunate that after the seats are alloted to the hooked and spiky applicants, extraordinarily high achieving students like you have relatively low chance of acceptance at the tippy top schools, even though your academic record and achievements likely far surpass theirs.
That, together with the issue of no financial aid for the upper middle class that produces many of the high-achieving students, is why our flagship state schools just keep getting more and more selective. The high achieving children of business owners (or at least those that cannot hide their income and assets), and high earning professionals are choosing to pay 30K/yr at their flagship state U, rather than 80K/yr at a more “prestigious” school.
That being said, I think that you are likely to wind up being admitted to at least one of your reach schools - possibly off the wait list in the late spring or early summer, but still, I think one of them will offer you a spot. You most certainly deserve it!