https://en.m.wikipedia.org/wiki/Hiroshi_Yamauchi
He took Nintendo from a playing card company to an international juggernaut who owns the biggest IPs.
He also never used to play games. He would greenlight games by having an employee play the game in front of him. Somehow he had a keen eye for game quality, since the Nintendo Seal of Quality was a big factor in the resurgence of the home console.
He was also a difficult person to deal with.