When my daughter and I toured east coast LACs a few summers ago. Vassar and Wesleyan bubbled up to the top of her list, for their accepting, friendly students and collaborative environment. D is an introvert and was looking for a smallish college where she could grow, make friends, get involved in extra curricular activities. Other colleges where we knew students (but did not visit) that seemed similar were Macalester, Grinnell, Oberlin and Whitman. She applied ED to Vassar, was accepted, is a happy rising sophomore there.
Given your son’s interest in Music, URochester and Oberlin should probably given serious looks. Macalester/Grinnell/Oberlin/Whitman/URochester all give merit aid to strong applicants.