Will is credited with npubs which are vanity addresses and zaps. FJ repackaged ssb, and cut out some of the complexity. Nostr is just a proof of concept really. Pepole have been tying social profiles at scale to keypairs since at least 2006, at scale since 2014 (e.g. activitypub), and altcoins do it all the time. I dont think its worth getting hung up on individual contributions, it really was a team effort, for example Greg Heartsfield, who you probably have never heard of, probably did more for nostr than anyone. FJ cared not at all about the ecosystem, which was the most important element. Manyh good devs left due to his caustic attitude. And there are many unsung heroes. I work quite a lot with Tim Berners-Lee, who invented HTTP, HTML, first web server, first web browser, and URI. He ALWAYS describes the web as a team effort. Which is one reason it was successful. You dont hear alot of that in nostr. Many of the celebs did much less than people think, and the people you dont know, did much more. But by far the most important person was Jack, who noticed the pattern and saw the potentially and really breathed life into it.