Walt Disney had influence over many people indiscriminately. Religious leaders affect determinate geographic areas, the same for political heads, dividing the world. But Disney went everywhere, homogenizing all kinds of people, with no indoctrination and no fighting.
Calling him The Greatest Showman, The Movie maker etc doesn't measure up. Being such a unique case, Walt Disney can pull off his own name as a title: The Great Disney.
To see him by the Xmas tree makes one feel like the whole world turned into a Xmas present!