I'm taking a wait-and-see approach in general, but I do find Yang one of the most interesting candidates so far. Just to respond to this specific point, Yang wrote recently on Twitter [1]:

There are lessons and principles that government can take from business - like treating customers well and resource efficiency. But anyone who says they are going to “run government like a business” is dumb. They require very different forms of leadership.

As a CEO you can pretty much tell people what to do. You are their boss. You are paying them. If you say we are doing something then it generally happens. The downside is no one tells you unpleasant truths.

In government most all of the time you are building consensus. You provide a vision and try to rally people around it. You build relationships. You compromise. You appeal to common goals. Things often happen more gradually. But when big things happen they can improve many lives.

[1] https://twitter.com/AndrewYang/status/1107126100163858432