This is one of those things that seems like a problem until you get there.
Nobody is really equally passionate about everything- but many people are very interested in a lot of things. One of the great things about the US approach to university is that you can taste of a lot of things, and then specialize in one that you find particularly interesting as an academic subject. As an example, collegekid considered a double major in physics & astronomy- but discovered after taking a couple of classes that she enjoys astronomy as a hobby, not a course of study.
With a very few exceptions employers are not terribly interested in minors, and if you double major in subjects with no obvious links (eg, French Literature and Physics) grad schools & employers will only really look at the one that is interesting to them. Doing sequential undergrad things in different subjects is kind of pointless, unless you have somebody who is happy to just keep paying for it while you become a perpetual student. Bear in mind, also, that in many areas, your peers will be spending their summers getting relevant work experience- not taking random series of classes just for the fun of it.
When you shortlist the colleges you apply to look at their core requirements (ie, Gen Eds), and look for those with relatively few requirements. Also, look into established multi-disciplinary subjects (such as cognitive science).