A dual BFA/BA degree is a rare bird. I only know of 5:
Brown & RI School of Design
Tufts & School of MFA
UMi
Reed & Pacific NW College of Art
New School (Parsons) (but I don’t remember who their uni partner is)
All of those are ferociously tough to get into. Of those, Tufts is your best bet for IR.
For double majoring:
On the IR side, of the places that you list Foreign Policy ranks Tufts #14, Swat #19, Williams #20.
On the art side, Williams, Bryn Mawr (part of the Quaker Consortium with Haverford, Swat & UPenn, so you can get a really strong IR degree) and Vassar (which has an interesting International Studies program- but not a pure “IR”) are closest to be comparably strong in both.