I think that Harvard would find you very interesting. There will surely be a discussion about your application. They will like that you come from Iceland, they’ll love that you’re a high-level dancer, they’ll find the bagpipes interesting. I agree that your predicted IB is a bit low for them, and if your SAT is low, you won’t get in. But with your high grades in school, if your SAT is high I think you definitely have a chance.
Make sure to submit the arts supplement, probably 3 minutes of your dancing.
As for the other schools, I think you’ll get into Madison for sure, and maybe some of the others. Of the highly selective schools, I think your best shot is at Harvard. It’s going to come down to your grades and your SAT.