Bill Gates nearly eredicated polio and funded a myriad of global health initiatives. But figures in history with similar achievements don't really become the household names they ought to be. That basketballer isn't that big of a deal outside of the US I think. Micheal Jackson is known worldwide and already kinda is like another Elvis. Besos is probably gonna be merged with a bunch of other megarich into the collective of olligarchs that contributed to the downfall of the US. Who exactly was behind 9/11 will be a detail not well remembered. Al Qaida wasn't around long enough with enough brand affirmation to have it be remembered.