CS will give you a skill set that is valuable upon graduation (and beyond), and having academic exposure to subjects that interest you will be a rewarding and enriching complement.
Instead of double-majoring, why not take courses that challenge you in a variety of areas?
Econ is great, but you may want to take a minor in the humanities. I'd recommend music, but art, literature, etc. are all good.
Think of your ideal "interesting person" and supplement your CS with something else you'll enjoy. If nothing else, you'll be a better writer and conversationalist.
I'm doing product design and CS. I get to be creative and come up with cool stuff and have the technical chops to implement them. Even if I never have to write a line of code, just knowing how to implement a feature I'm designing helps a lot - it keeps things reasonable and enhances communication between the conventionally-at-odds dev and design sides of a product.
I would recommend philosophy. The college of "logic" is in the philosophy department and every great CS professor I ever had studied philosophy. Beyond that it is a great way to sharpen your critical thinking and problem solving skills.
Instead of double-majoring, why not take courses that challenge you in a variety of areas?