Hi all, I thought I would post with an update. After visiting lots more colleges, here is his final college list.
REA: Stanford
Early Action: UVA, Virginia Tech, Penn State
Based on this topic, we were going to apply to Ohio State; however, he tried to contact the music teacher numerous times unsuccessfully, so he decided not to apply.
Regular Decision: Northeastern, BU, Harvard, Princeton, CMU.
He uploaded an arts supplement, resume, and music recommendation to all the schools that accepted them.
Note: This was pretty much the max number of applications he could do without going insane. He applied to Northeastern not just because he liked the campus, but because of an application waiver and no additional essays.