3. Bill Campbell
3. Bill Campbell
Position: Nonexecutive chairman

Currently: Chairman, Intuit Inc.

In the late 1970s, Campbell coached football for Columbia University; today the 71-year-old coaches tech entrepreneurs through their knottiest problems. (Protégés include Google chairman Eric Schmidt and Twitter's founders.) He has big-company chops, having worked at Apple and Intuit, on whose boards he sits. Campbell doesn't advise so much as guide; he eschews attention, doesn't charge for his services, and rarely invests in the companies he helps. His independence -- and deep knowledge and connections -- makes him an ideal nonexecutive chairman.

--Jessi Hempel

@FortuneMagazine - Last updated July 26 2012: 5:38 AM ET
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