Ruger was a genius, and innovative, at least as far as taking advantage of the latest techniques. I am sure he helped advance investment casting as much as most invvolved in it. No doubt he is an icon in gun manufacturing. He was probably more personally successful in terms of financial gain.
Browning was a true inventor, going where few had been, and going there unguided by those who had. I don't thinki he became as personally wealthy as Ruger, but I bet his heirs did!
OK, reread the ques- Browning was far more productive, ingenious, and innovative.
Think of the term "Browning type" auto pistol. He picked up on gas operation watching the muzzle blast make grass wave. The recoil op A-5. The BAR, to give troops a 'portable' machine gun to take across no-man's-land. All the 'good' Winchester levers (and SS). The Superposed. On and on.........