Luffy has all the skills Kid, Law, and Zoro have, but better
His haki feats shit on zoro's. He split the sky with kaido and was more or less fighting on par with him up until Mr. Go interfered. His ACoC portrayal is clearly far better for the aforementioned reasons(Zoro didn't even learn to use it until his fight with king). He has internal destruction while zoro has only shown barrier CoA. and Luffy has FS.
His awakening feats shit on Kid/Laws. Unlike the latter, his awakening actually increases his stamina instead of decreasing it. He's also able to hurt kaido with awakening alone, just like they were with big mom. Yet he hasn't even used any named attacks with awakening, and we can assume he is capable of stacking awakening with G2-G4.
Maybe they could 3v1 or 4v1 him, but they 'd definitely lose a 2v1.