1. He Is the Single Highest-Grossing Filmmaker In History
Since Stan Lee gets an Executive Producer credit on pretty much every Marvel film ever (including ones for characters he didn't create, like Captain America) and Marvel films have made A LOT of money (The Avengers alone is the 3rd highest grossing film ever), Stan Lee movies have made over 11 billion dollars. Take THAT, James Cameron.
2. He Made His Comic Book Debut As a Text Filler
The comic was 'Captain America Foils the Traitor's Revenge' in Captain America Comics #3 (May 1941). On top of it being Stan's debut, it was ALSO the debut of Cap's signature move - throwing his shield like a frisbee that would bounce back. This was the first time he used the name Stan Lee (his birth name was Stan Lieber).