Need a reach school or two!
I disagree with the very premise of the question, actually. Nobody needs
You really ought to have safeties, and you probably ought to have some matches. Beyond a couple of those, everything else is optional.
Do you have more than one university on your list that you believe--based on actual research, and not just some kind of intuitive sense
-- meets all
of the following criteria?
1. You're pretty sure you can get in.
2. Your family is pretty sure they can afford to send you there.
3. You're pretty sure you can be academically successful there.
4. You're pretty sure you'd like it there.
If you have more than one such university on the list, you don't have to expand it unless you find a college or university that's even more appealing than the ones on it.
Of course there's no reason for you not to keep shopping for another college or university that you'll like even better than what's on your list. But given that I know nothing about business or schools of business, I don't have anything to suggest.