Your assessment of the CEOs is based on how impressive they seem. Keep in mind that one of the main jobs of a CEO is being a good schmoozer and an inspiring leader. They are selected for their ability to appear smart, to convince others to follow their ideas, and generally to "sparkle". Of course it helps if they actually are smart, but that's not the primary criterion.

What happens if you base your assessment only what they've personally accomplished or written (as for Jaynes) where it can be separated from their charisma and force of personality? I'm guessing most of them wouldn't nearly do so well.