I got my undergrad in Professional Aeronautics with a Minor in Aviation Safety. I wanted to build my aviation knowledge and experience, so my graduate degree is in Aeronautical Science specializing in Aviation/Aerospace Operations. As a fall back, I have found plenty of teaching positions that pay at least $55k with this degree and pilot/flight instructor experience. Of course, you'll hear the majority saying that you shouldn't get an aviation degree.

I would recommend either a graduate degree in Aeronautical Science or an MBA in Aviation/Aviation Management. Harvard, Stanford, etc. might be a better option if you get out of aviation, since they are not specifically related to Aviation.