So let's say I want to run a game in a universe similar to John Wick. Or even the John Wick universe itself. A world of gunplay, ruthless criminal politics and luxurious settings, where the profession of freelance hitman seems very common and even respectable.

I'm thinking that World of Darkness might be good for this. It's a system that is both simple and versatile, and include mechanics for gun use, kung fu, stealth, and calling upon your allies, retainers and contacts. Perhaps Shadowrun would be good too, if you remove the magical and futuristic elements.

Any other suggestions?