Zoro would kill Kaido and then he would low/no diff a commander.
Simple shit.
Learn you God Damn One Piece, Zoro body bags the subordinates when Luffy defeats the captain only due to plot armor hence why Zoro > Luffy's turd ass.
I am willing to guarantee you, and (you will look like a dumb fuck if you disagree with me when it happens) that post Wano you would see Zoro defeating a YC1 level character mid diff or less.
You can take a screen shot of my comment if you want, if YC1 level (or less) character pushes Zoro past mid diff, show me my comment and I will delete my account.
Aaight Peace