6. Marc Benioff, Founder, Chairman and CEO, Salesforce.com
It's hard to find a CEO who relishes his maverick status as much as Marc Benioff does. The Salesforce.com founder is the original cloud computing kid. His drive and determination have made him the poster boy for the SaaS revolution. And Benioff has not missed a beat since founding Salesforce.com a decade ago, always pushing the company into new territory.