I would consider a discipline that interests you and that you are passionate about. As you graduate and take on work in the consulting space, you will want try to align that skill set and passion in the work you would be doing for clients.
I would recommend looking at a tech based minor (at the least) as this seems to be the greatest Demand in the market today. I often will hire students with a strong understanding in a core skill associated in tech - (code development, cyber, SaaS development, etc.) along with a core business discipline like - marketing, sales, finance, Data Management, supply chain management, human capital, etc.