I'm pretty sure Alex Klein finished his degree in something, not sure what. I remember him mentioning it back in the day, about the same time I finished college, and I was psyched on it.
But this depends a lot on if you're only talking about pros/ams or just people that skate. There are plenty of people that skate / used to skate (like really skate, not some kid who can barely ollie) that are doctors, lawyers, etc...even just from my circle of friends. Legit careers. If you're talking about pros/ams...that'll be a much shorter list, but still a list.