They did seem to draw from common sources, but that’s not at all the same thing as the later one derivative modeling itself on the earlier derivative. Similarly lots of things draw on Northern European history and traditions and myths and superstitions, and some also borrow from each other, but not all. _Dungeons and Dragons_ did borrow from Tolkien, but it also borrowed from _Chainmail_, and (judging from its reputation and from my very old memories of skimming the _Chainmail_ rulebook) that was mostly directly based on Northern European history and tradition, not routed through some influential riff on it like Tolkien.

Captain Hook did do the pirate thing earlier, but the Dread Pirate Roberts was not necessarily based on Captain Hook.

This doesn’t actually work due to the modern, real world Middle East not being a very good mirror to the fictional Arrakis in a wide variety of ways, from population density to urbanization to the presence of alternative sources of the commodity in question.

Bin Laden’s goals are also materially very different from those of Paul.

Bin Laden modeled himself and his strategy on Paul Atreides.
Only it didn’t quite work out for him.