Arguably the father of nearly all modern semi-automatic pistols available today.
He essentially invented the Slide, the Tilting Barrel, etc. Most designs like GLOCK, Sig, etc are derivations of his inventions.
Plus his genius gave us many rifle and shotgun designs, many of which are still produced today,
Add in the machine gun designs, and he may well be called the father of modern firearms.
There should be statues of him in public places.