mtraininjax...lol. I don't know enough about the stadium deal to comment, but your example is just way off base. I can name on one hand private sector leaders who truly care about Jacksonville and make visible and impactful differences. I don't think I can conjure up 1/20th of the people in Atlanta even if I researched, or 1/5th in Charlotte or Nashville.
That's hopefully not too insulting to those with influence and who put forth effort who may read that comment, but it is true, sadly. Arthur Blank has invested so much in Atlanta already, probably enough to buy the City of Jacksonville if that were possible. His stadium thing may be a bad deal and may pose conflicts with the state, taxpayers, fans etc, but it's offset at least with everything else. His partner Bernie Marcus has certainly contributed hundreds of millions of dollars to Georgia Tech and Emory, and countless other not-for-profits locally. They both provide seed money and advise funds, chair non-profits, sit on community boards, bring business to the city, etc etc.
In development world there are even more examples, and as has been mentioned Jim Borders is certainly one of the big names, as is Michael Brewer and Katherine Kelly, the three instrumental folks at Glenwood Park. It took a good bit of personal financing from all three.