: He is a member of Team Kakashi and Konoha 11, this team helped with key missions to protect the Village. He has also helped establish an pre-war arc alliance with sunagakure, since he was one of gaara's close friends. Great feats during the war. Expended himself with clones, defeated many important foes. He used his sense of bad will to help find disguised zetsu. He rescued many people and helped turn the tide of the war in the alliances favor. He has never hated anyone, even though everyone hated him. He has a great ninja way which centers around helping others over come their hate, clensing them so that they can see clearly. He liked to help everyone. Even some foes. More feats will be seen in later chapters.
: He was know as the Genius of the Uchiha clan. He helped with key missions along with Team Kakashi when he was younger. He later left to seek revenge on his brother for the massacre of his clan. Later learned why he did it. Vowed to destroy his village. Attack on the Kage Summit, this was mostly defence, he only wanted Danzo, but other Kage tried to deal with him. He killed the 6th Hokage Candidate, which even though it was traitorous, it was logical and it benefited his village. He also killed some allied Samurai but who gives a ****. Later turned sides again. He, along with Orochimaru and Taka helped the alliance. They revived the Hokage, this played a key role in the war. He helped with the onslaught of the Juubi clones. Many chilling things have been seen in the last few chapters about him. Things like this.
More feats will come with the later chapters.
: She has a good standing. She helped heal many shinobi, while also help to combat the Zetsu intruders who disguised themselves as shinobi. She is now one of the best medical shinobi, she had an apprenticeship under the 5th Hokage, who was probably one of the best Med-nin of all time. She has great chakra control, which rivals even her teach Tsunade. She has knowledge on village affairs. She is the reason Gaara's older brother is alive. A debt that still hasn't been repayed. She was part of the mission that brought Gaara back. When she was younger she belonged to Team Kakashi, she helped with key missions and did her part. After Sasuke left, readers started to see her in a bad way. Her blind love for Sasuke messed up her missions in the Sasuke Retrieval arc. Even now she still shows signs of attachment, and blind love. She has attachment problems and is emotionally unstable.
She also has a great summon, that is able to heal shinobi, even from the brink of death. More feats will come in later chapters, hopefully.
: A good intellectual and strategic shinobi. He is unbiased and has a good, clear understanding of right and wrong. He would be able to make good decision, he can analyze the consequences, good and bad, of a decision. I believe he has the intellect of a hokage, but not the Power, and strength. But he uses his intellect to the best of his abilities, putting brains over bronze. For example, he killed Hidan.
I see him more as a Person in comparison of a President of a country. He runs the country, makes decisions for it, and helps destribute military force when needed. But he lacks the Strength of a hokage. He doesn't have the strength to protect his village, on his own. If the time came he would not be able to 1v1 other Kage level shinobi. But he does have other shinobi to do that for him I guess... This is the reason why I see him more as an adviser, then a hokage. But he does have the balls to step up to the plate and fullfill his duties.
: Great analytical abilities. He is very intellectual, like shikimaru. He was able to defeat Torune, and help with saving many lives, even though it wasn't canon. Again, I believe this candidate is not Kage level. I do not want to underrate him, but his bugs might not be enough to handle many Kage level shinobi... but he would find a way to get his bugs to you, and once he does that, you are done for.
: ...He was only jealous, he doesn't deserve to be on this list...