In my opinion, the hardest hall of fame to get into is the National Baseball Hall of Fame. The reason being, it not only requires exceptional career statistics, but also a high level of character and sportsmanship. Additionally, inductees must gain at least 75% of votes from the Baseball Writers' Association of America, making it an extremely selective process. Furthermore, once a player retires, they have to wait at least five years to become eligible for induction. Overall, the combination of talent, character, and stringent selection criteria make the Baseball Hall of Fame the most difficult to enter.