How you train is how you fight
Normies can't fight and so long as you train a genuine combat sport and put in the effort to spar and drill, you'll dance rings around the drunks outside the pub or whatever
So the issue is when knives or guns or mates come out
I'm gonna suggest judo, since it's the only combat sport that prioritises handfighting and arm control, which you probably want if you're fighting someone holding a knife or gun or big stick. You'll still need to be mindful, actively fight over the danger hand instead of just gripping the sleeve and going for the lapel, but you're set up for it better than say a boxer who doesn't grab wrists at all
Judo not so great at the fighting multiple guys though - in theory grabbing one guy and kuzushi-ing him around to keep the other guys off you might work quite well, dunno about that in practice though
Of course on the other end of the spectrum, a boxer is going to be well equipped to stay out of knife range and see long-range stabs coming, but punching is dangerous because unlike with punches you can't win a trade with a knife, you just get stabbed
The advantage of grappling is that if you do get him down, it's much harder for him to fight from the bottom than it is for you to fight from the top
So idk really, just train what you want to train, and when you get into a street fight against five ninjas armed with gunchucks, just get lucky