For worldwide shock and commotion it would have to be someone young or in their prime/peak popularity/notoriety, that dies suddenly or tragically.
Like Taylor Swift, Messi, Sydney Sweeney.
Also someone that would leave a huge power vacuum/succession like Putin, Trump, Elon, Prince William, MBS,Kim Jong.
If any of them died unexpectedly there would be a shitstorm.
When Kobe died it hit hard because his daughter, and other innocent people, died as well. It was such a sad, yet preventable tragedy out of nowhere.