Among the schools you listed, as far as I know: Case Western and Williams do offer great funding, Tufts offers partial funding, IFA and Columbia do use MAs as cash cows, check out the recent thread about the horrors of the Courtauld borne out by years of evidence, Fordham is great but financial support is not guaranteed, York has great medieval studies but the programme structure is similar to the Courtauld. Curatorial: Case Western is closely affiliated with the Cleveland Museum of Art, Tufts with the Boston Museum of Fine Arts, and Williams with the Clark. If you are interested in medieval art and the curatorial side of things, think about these museums’ collections. York, of course, is in a medieval city itself!
Make sure to get in touch with profs at these schools and ask for emails of recent or current students.