Ted Turner
Inherited a billboard company. Nobody in media took him seriously.
Built CNN. Changed how the entire world receives information.
When Ted Turner announced he was starting a 24-hour cable news network in 1980, the established media laughed. Walter Cronkite had thirty minutes a night and that was enough. The networks had decades of experience, infrastructure, and credibility. Turner had a billboard company and a conviction that the news cycle did not have to end at 6:30pm. He was right and they were wrong. CNN was on the air during Tiananmen Square, the fall of the Berlin Wall, and the Gulf War. The experienced people said it couldn't be done. The unconventional one did it anyway.