Are we really arguing over who has been more impressive? It doesn't matter really who had a better portrayal up to this point in the arc, considering nobody in Wano (or possibly in all of OP) is capable of beating Kaido in a 1v1 match, so it really doesn't matter if Zoro/Luffy/Yamato has done the most damage so far.
Anyway, I think Luffy has done quite well up to this point in the arc, considering that he can now harm Kaido with ACoA and CoC, which means he has the means to harm anyone else in OP. The arc isn't even over yet anyway so let's not jump to conclusions, but rather respect each character for what they have contributed so far in the fight against the Beasts Pirates.
Anyway, I think Luffy has done quite well up to this point in the arc, considering that he can now harm Kaido with ACoA and CoC, which means he has the means to harm anyone else in OP. The arc isn't even over yet anyway so let's not jump to conclusions, but rather respect each character for what they have contributed so far in the fight against the Beasts Pirates.