You have no idea what are you talking about.
I work developing games since 2005. Worked in over 40 published games, from solo dev games to indie games to mobile games to AAA games. I worked with and for multiple gaming industry legends, even people who unlike Kojima, Miyazaki and Cory changed the industry.
These 3, like some of the ones I worked for/with, are PR stars more than visionaires. You, a player, know them because they appear in the interviews or in the awards ceremonies etc. because their company decided they were the ones who do fit in these roles and because in their marketing & PR campaigns considered it was good to highlight them as visibile heads.
In most cases, these visible heads are executives, producers or game directors with little to no involvement in the direct development, quality and polish of the game, the specific part that makes them cool. Which in most cases is thanks to their concept artists, game designers, programmers, artists, composers, audio designers etc. That whole team, or at least their leads and directors of the different areas, are the visionaires.
There are hundreds, nowadays even thousands of people working on these ships on different roles, a lot of them very important doing a job that if not done properly he ship would sink or suck. The boss who appears in the marketing campaigns is only one of them.