There will be an American with more children then Elon Musk who is famous enough to have a Wikipedia page, and whose fame did not mainly come from their status as a parent of many children, nor from entertainment type activities (not from personally producing music, art, standup, writing, sculpture, and similar future things). If they are say a nonmusical ceo of a music production company, no problem.

The number we use on Elon's side is the highest value of "how many children did Elon have".

EDIT: 11/2/2023 - Sports does not count as entertainment.