Law: Law seems like a high-earning career if you can make it big, but there's a low chance of making it big. I've heard anecdotally that you basically need to get into a top law school or you won't be having a good time, assuming you can pay for that law school.

I endorse this perception.

I think this would be moderately enjoyable and with Moot Court, a Constitutional law class, and a Political Science major, I'm as prepared for law as anyone can be in a liberal arts school.

Practice at rigorous, high-quality writing (such as writing well-graded papers for class) is valuable for working a legal job. Political and moral theory, rather a lot less useful for the day-to-day, year-to-year work.