A social CEO is one of the greatest assets a company can have. As research by Weber Shandwick demonstrates, two-thirds of those surveyed say that their perception of a company’s CEO affects their opinion of the company’s products or services, and 81% of socially-engaged CEOs are from what consumers deem ‘reputable’ companies. And that’s no coincidence.

So, who are the most switched on CEOs? Google’s Larry Page, maybe? No. King of social Mark Zuckerberg? Nope – he doesn’t even feature in the top 40, according to TopManagementDegrees.com’s most influential list, below.

The most influential CEO, apparently, is none other than talk-show queen Oprah Winfrey. And media mogul Rupert Murdoch follows shortly behind.

Of course, Oprah has universal appeal, and Murdoch has a colossal following of haters as well as fans. But while there are some shining stars of social media in the list – Foursquare’s Dennis Crowly edges into the top ten, and Twitter’s Dick Costolo takes 14^th place – is this really good enough for social media’s supposed pioneers?