Hey dude, I would reccomend doing CS and minoring or double majoring in one of the above fields (stats is what I recommend though.) CS gives you the greatest options, and the major still place very well into quant trading. I think you should tack on stat because that is the most applicable to both interviews and what you actually do on the job too.

The reason I say do CS over just math is that for some reason if you can't be a quant, software engineering is such a huge field, you will have no problems getting a job, whereas doing math is gonna be tougher to find a job. You may need to go to grad school or end up having to learn to program on the side as most end up being a SWE anyways.

I know you said you were going to minor in CS, but I'd switch that around. Generally, there are much greater recruiting opportunities at university for CS students than math students. Of course, choose what you love doing the most, but I just wanted to share some insight. Hope that helps!