My personal experience (as assistant to a CEO) was that between him and the CFO they could have run every aspect of the business competently. He had very consci

My personal experience (as assistant to a CEO) was that between him and the CFO they could have run every aspect of the business competently. He had very consciously found another executive who complemented his talents so that there was full coverage. The breadth and depth of knowledge was intimidating and very impressive, and they could drill down to the necessary level to uncover bullshit anywhere. They rarely did, but knowing that they could prevented a lot of nonsense.