Sasuke and Shikamaru for sure
1. Because he's a genius and because he must surpass his father, Shikamaru will be one of the advisers
2. Sasuke because he is the yin to Naruto's yang. I've written about this before where I argued Sasuke would be yin advisor to Naruto who would be yang Hokage. copy and paste;
To clarify, I’m not talking about yin and yang nature transformations here. I’m talking about their life philosophies.
Yin and Yang is different from good vs. evil. They are not opposing forces. They are complimentary forces. Yin can’t exist without yang and vice versa. (In the western world, people see them as good vs. evil but this is not the case. I’ll use Star Wars as an example. The empire is evil. The Rebel Alliance is good. Good triumphs over and destroys evil, and have a happily ever after … until the sequel trilogy.) This is not the case with yin and yang. You need both yin and yang to have balanced decisions.
Naruto has very yang philosophy, while Sasuke has very yin philosophy. Together, they should make the perfect team, able to come to balanced decisions. If a certain weakness in Naruto prevents him from being the best Hokage, Sasuke advises him of that and vice versa. Problem solved. Naruto runs off to save people but Sasuke stops him and reminds that he is Hokage and must stay with the village. Sasuke gives "burn them all" advice, and Naruto says no and argues against it. Naruto wants to win a conflict by using talk no jutsu on everybody and their mother. Sasuke rolls his eyes, says that is unrealistic and can never happen. Each weakness in one is a strength in the other. In conclusion, Naruto should become Hokage with Sasuke as an adviser. They are opposites, and that makes them the perfect team.
3. Would be either Shino or Kakashi since they're both analytical and not emotional. Most likely Shino because he's a part of the new generation,