Engineering, medicine, business covers most choices that pay well, and there is demand. Business in particular is a catch-all which will let you get into any industry that pays well.

Of course there are niches outside of them that need a few smart educated people, but they are niches that can only take support a few people and get saturated easily. We have "starving artist" as an expression in English for a reason: there are a lot of great artists that will never really earn enough for more than the cheapest food and shelter with nothing else left over. (there is nothing wrong with such a lifestyle if you are not in my family - if you are in my family we want better for you, and in particular the grandchildren which your life will not support)