You must be registered for see images
Considering IMO Mei Terumi is the weakest kage out of the Gokage and the loss of their greatest jounin Ao the closest Mitzukage candidate is Chojuro.....enough said. Hell Suigetsu would destroy Chojuro and take his sword imo and while Suigetsu is one of my favorites he isn't kage level i will admit but he is imo due to hydrification High Level Jounin.
You must be registered for see images
What they really need is to bring back the 7 Swordsmen of the Mist due to their powerful swordsmanship and overall powerful skills.