The best undergraduate school is the school that gives the best preparationg to the person in question in order for him or her to be at his or her most competitive level when it comes time for graduate school auditions.
I am also curious - what are these top ranked graduate schools you have on your mind?
Harvard posts the undergraduate provenance of its graduate students - you can look it up; as I recall they are from a wide variety of schools, including Harvard, Princeton, UC Berkeley, Oberlin, Juilliard, Bowling Green, Oxford and Cambridge UK, Colorado College, Stanford, William and Mary, Amherst, Smith, Brown, Queens; i.e., all over the place...graduate schools accept few students each year, and they look for strong preparation (which you can get at many schools), top grades, top recommendations, writing samples, and a decent score on the GREs; they look for adequate music analysis preparation.
Mezzo'sMama3550 replies84 threadsForum Champion Music MajorForum Champion
May I suggest that the OP begin this research on her/his own? There is another post asking us to "list the best music schools in each state" and still more that are along the same line. It is not the time for the student to be concerned with graduate school- much research should be done solo and with the teacher rather than beginning threads with nebulous questions/answers.
Replies to: Music Schools: Undergraduate into Graduate School
I am also curious - what are these top ranked graduate schools you have on your mind?
They are looking for how good the applicant is. Not where they obtained their BA or BM.