18. Joe Tucci
His technology smarts and vision have given EMC what may well be the best technology hand in the IT business. Joe Tucci’s latest eye-popping acquisition -- the $1.2 billion purchase of enterprise cloud superstar Virtustream. Forget the "Star Trek" references to the Federation – EMC’s is the real Federation – bringing together all the groundbreaking technology Tucci has put into the EMC basket since taking the helm 14 years ago.