The most useful techniques for street fighting are either conflict de-escalation or track and field, to be honest. You could square up to one person only to get a bottle to the back of the head from his buddy behind you.Yeah, but there's some variables.
1- against 2 guys, it will do no good since if you take one down, the other will kick your head
2- is good if the other have no weapons
3- "no rules" fight. Usually when training we have a lot of things we cannot do, in a street fight, we dont. So you can have a finger in your eye or your balls kicked, and fighting that close, is a huge possibility
4- if the other knows how to defend a takedown, you're fucked
I had a broken jaw because i trusted my jio. I was in a bar and after some story fight started. To tell the small version, the tooked the other guy to the ground, he managed to grab my balls and i had to let him go. He hits me in the face and next thing i remeber is me in the hospital. So i would argue that boxing is much more useful (or muay thai)
But against this beast? I think you would be lucky to be close to him
But if those aren't an option then boxing, Muay Thai and Taekwondo are the next best thing.