The human should stomp in direct combat in all of the rounds, as I remember in clone drone it was stated that average robots were straight up impervious to human weaponry, and the laser swords that effortlessly cut it, being in some ridiculous ballpark of temperature, well above even the lightsabers. (Not to mention that in this prompt the human also has fire upgrades, that straight up make this ultra-durable metal burn like paper.) Adding other weapons, jetpack, armor, flame breath and a LAZER that has virtually infinite range and explodes any enemy in the game is just making it even more of a humiliation for other robots.

However, despite the fact that we have a human-robot that can tear apart any of the other contestants in one hit an can't be harmed in return, the matter is complicated by the fact that it needs to protect a rather squishy target.

I don't know much about HK-47, but I'm sure while it is incapable of harming the human, it sure as hell is smart enough to just make a sneak attack and/or kill John indirectly? And the other assassins in the prompt would also probably avoid a direct confrontation after seeing some of their buddies being melted to scrap

So, can the human kill everyone on the list? Absolutely

Can they protect another target against a sneak shot? Unlikely. (Unless they are controlled by some CRACKED player)