I gotta go with…
Mizukage: 2nd, Gengetsu (obv choice, prolly the least contentious one)
Tsuchikage: 3rd, Ohnoki (young, as he seemed to still be able to keep up with Mummy Man Mu the 2nd even as an elder)
Raikage: 3rd, A (pretty contentious in that a lot of people wanna hype A #4, but A #3 is just everything that makes A #4 formidable kicked into high gear)
Kazekage: 5th, Gaara (adult cuz I’m still not convinced that Gaara is as powerful during the war arc as people claim he is, since he still didn’t seem to have fully surpassed his father, but there are also a lot of signs pointing to him being way above that level which make it really difficult and annoying to scale him)
And finally…
Hokage: 4th, Minato (since I said no Hashirama, Naruto or DMS Kakashi, I decided this would be the best option despite still not knowing exactly how I feel about Minato vs. Prime Hiruzen and that whole hairy debate that people will probably get mad about just from me bringing it up, but the main reason I settled on Minato for this particular context is the strategic edge he would offer that I don’t even think any of the other options could bring, let alone the final selections)