19. Zach Nelson
Zach Nelson is the undisputed and undefeated midmarket cloud computing king of the hill. No one has done more to deliver cloud computing to midsize businesses than Nelson. He's made mincemeat out of any and all competitors including Microsoft Dynamics, whose longtime channel chief joined NetSuite in June. Nelson's latest battleground -- integrating ecommerce with SuiteCommerce InStore into the robust NetSuite ERP platform.