Armband-Mondo

It would be a hell of a twist but also a most likely one for that to be Zoro, considering his dieing loyalty and stubbornness to over rule Luffy at times for the betterment of the crew and to hold ppl accountable. Looks like it would be a epic clash of ideals and realist ideas

What about Katakuri and his Mochi Mochi devil fruit that can take on any shape or size as he sees fits and with armament haki, he make them all solid objects for even more versatility? That's the most versatile for direct battle or support I've ever seen in my opinion