I think it will be interesting, too.
Emperor - luffy
Uncrowned Kings - Zoro
3 Commanders - Sanji, Yamato, Jimbei
Tobi Roppo - Robin, Franky, Brook, Chopper, Nami, Usopp
Then we have mr. Dark bed king (mr. Prince pun) which didnt show until his appearance in front of the opponent to shock the opponent by his existence.
For example, just example,... Imagine SH sparring fight with RH executives only for 2 days while Zoro recovering. Then Mihawk comes, at the same time Zoro appear fresh and 'old'. Then we have another 1 day sparring that will be end with a feast. About who gets who, we can guess that. and we can imagine thw others.