What's your authority for claiming that Hughes was ever the richest man in the world? Rockefeller had him outclassed; after Rockefeller's death there were any number of others who almost certainly had more money.
Although Hans Zimmer did work on later films in the series, the music for the original Pirates of the Caribbean film (and so the main tune that people will think of) was composed by Klaus Badelt.
Hans Zimmer was the producer of the score for the first film, and he himself composed most of the main themes. He delegated the orchestration and additional composition work to eight other composers, including Klaus Badelt, who did most of it. The soundtrack album credits Badelt alone as the composer, but the iconic themes were mainly by Zimmer.
HC -- whatever you think of his politics, he was elected president (3x) in what is generally thought to be free and democratic elections -- probably more free and democratic than many of the "democratic" regimes not opposed by the US. As for his successor - Maduro; the term "boss" would be more valid.
I hate to be that guy again, but only three women out of 21 answers? It's not as if they make up more than half of the world's population... (I realize that men have had more opportunities to be remembered in history, but still. 25% would be a start, if not more...)
Thank you!