Steve Jobs, 56
Much has already been written about the Apple co-founder in these pages and many others. Love him or hate him, his influence was undeniable. Under Steve Jobs, Apple came to dominate the digital age and set standards for product design, first through the creation of the Macintosh and later with the iPod, iPhone and iPad tablet. A master marketer, Mr. Jobs took a traditional approach to advertising, telling the story of how a product can change a life in the best environment possible. He believed that he knew what people wanted before they did, and he was often right.