For starters, Franklin was an intellect, a printer and a writer. Franklin was one, on a short list in history, of "polymaths." Franklin was a leading author, political theorist, politician, printer, scientist, inventor, civic activist and diplomat.
Staisil has given you the basics.
Now, look up the definition of polymath and go from there.
He was the most brilliant diplomat this Country has ever seen - at a time when we really needed one.