I doubt anyone is going to be rejected for having a 2100+ score, but it certainly makes things more difficult at the schools you’ve listed. I see a few positives in your profile, a negative or two, and some things worth noting. With regards to UW GPA, the scale you give (A=4, B=3, etc.) is what colleges will generally use, though many of them take into account gradations of a given letter grade (B+ is somewhere between 3 and 3.5).
The good news is that your course rigor is fine, student council involvement is a good EC, and the essay award will look good (list this in the “awards” section of the common app).
The bad news is that your extracurriculars don’t seem to have a strong focus or national/international recognition, which is what it can take to stand out at a lot of the schools you’re looking at. And being asian is never a good thing from an admissions standpoint - the effect has been estimated to be tantamount to a 100-200 point drop in your SAT score. Your lack of legacy isn’t going to help, but you’re hardly alone in that.
You should spend a lot of time on your essays, because essays and recommendations are how most top schools will differentiate between 20,000 qualified applicants. If you feel like your supplements are anything less than your best work, you should rewrite them. This is a large part of the reason I would counsel you against applying to 15 schools - you just won’t have the time to write good supplements for that many colleges.
In cutting the list down some, I would again urge you to start with the Ivies. Brown, for instance, is a school where the focus is largely on your major - pick an interest, and take most of your courses in that field. UPenn is completely different, in that double majors are common and many students will self-design a course of study that often lacks a laserlike focus. If you’re looking for a school in or near a city, Columbia might be the place. Dartmouth, a couple of hours away from Boston, would probably not be your cup of tea. Or maybe you want to avoid large cities and would love Dartmouth. I don’t know your situation, but these are factors to consider before applying.
If you can cut that list down some (I’d suggest losing about 5 schools), that’ll allow you to devote considerable attention to each application. As long as you write good essays and your teacher recommendations are good, you’ll almost certainly get in somewhere, and all these colleges are good schools. Whatever may happen, you’ll be in a position to succeed once you matriculate, and a university education is what you make of it, so don’t worry too much about getting into a particular school. Best of luck.