Oogway

Oogway (also known as Master Oogway) is the overarching protagonist of the Kung Fu Panda franchise. He was a very wise and old male turtle who created Kung Fu himself and is the creator of Jade Palace, founded the Valley of Peace, and the developer of the Dragon Warrior legend. He was voiced by Randall Duk Kim for most of his appearances and by Piotr Michael in Kung Fu Panda: Paws of Destiny.

What makes him Pure Good?

 * He was also an ally of the original Four Constellations and conspired with them to prevent their fallen master Jindiao from capturing the Wellspring. Oogway also recruited Bunnidharma to craft the Spirit Urn for use against Jindiao, but the plan to trap his spirit within it failed because Bunnidharma didn't deliver it in time.
 * Stood up against Ke-Pa and his demon army when they ruled the Valley of Peace in a state of terror and free it using his Hero’s Chi and trap Ke-Pa in a mortal pig body with the help of the Peach Tree of Heavenly Wisdom that restored his Hero’s Chi.
 * Following the defeats of Ke-Pa and Jindiao, he was implied to be a conqueror in his quest for peace. This meant he possibly had a powerful army with Kai as his general proves that he is implied to be the cause of multiple deaths. But unlike Kai, who didn't change his ways, Oogway found another way from the Panda and it molded him to be the hero he is today. It is also implied that he felt remorse over his past actions with Kai, so he possibly wanted to atone for his mistakes.
 * He exiled Kai, his old friend now enemy, to the Spirit World only because he had no other choice to stop him as he was stealing the Chi of all the pandas. And he also did it out of great regret.
 * He is always patient with anyone.
 * Created the art of Kung Fu which would be taught and spread all across China, and built the Jade Palace in order to teach this discipline and watch over the Valley of Peace and to cover the seal to the underworld.
 * Took Shifu in and raised him after finding him abandoned by his father, Shirong, outside the Jade Palace.
 * After defeating Monkey in a duel that many others could not do, and while Monkey did behave like a thug, Oogway could understand this having perceived that in him apart from pride and rudeness there was also pain and suffering and saved him from a pole that was about to fall on him and allowed him to stay (which all the inhabitants wanted him to leave) and use his potential for altruistic purposes.
 * While everyone saw Thundering Rhino, Croc, and Storming Ox only as criminals, Oogway made them realize that there is so much more to them.
 * While he is a wise teacher he is shown to resort to lental measurements as he directly endangers the lives of his students as he throws Rhino, Ox and Croc down a cliff so they could learn teamwork and form a bridge to save themselves so he could cross and pick them up, which had high potential to kill them had they not learned, and deliberately got Shifu to receive food poisoning (he later use his nerve attack technique to cure him) so Tigress could recruit some people with barely any experience to fight a dangerous villain like Boar, who nearly died during their battle, in order to form the Furious Five to get Po inspired by Kung Fu. However given he can see the future it possible he only saw the best way for them to learn.
 * He was able to see the darkness and pride inside Tai Lung unlike Shifu, who was always proud of him and did not notice it, refused him the Scroll of the Dragon, only fighting back when Tai Lung attempted to take the scroll by force.
 * He chose Po as Dragon Warrior because unlike all the others who considered him incapable of this assignment he was able to see beyond what he saw with his eyes (apart from remembering that his relatives had healed him in the past).
 * He is the only one who cheered up Po after everyone laughed at him about his first fiasco in Kung Fu ending in failure and when he expressed doubts in whether he should quit, telling him to think about the present instead of what happened or what is going to happen.
 * He convinced Shifu that he really just have to believe to help someone with something, like in the case of Po, helping him become more open-minded and accept Po as the Dragon Warrior.
 * Sent Po's father the message that his son was alive.
 * When Kai attacked him in the Spirit World, Oogway still attempted to reason with Kai and settle things peacefully before surrendering and entrusting Po with the mission to defeat Kai.
 * Spoke to Po in the Spirit World, imparting his final wisdom and officially declaring him as his successor.
 * Gave wisdom to Po and gave guidance whenever he needs help.
 * After Jindiao permanent defeat, Oogway told his old friend Bunnidharma (who failed to help defeat the fallen dragon master in the first place and caused the original Four Constellations to die) that not many people don’t get second chances and congratulate him on help Po and the new constellations defeat Jindiao. Oogway also didn’t showed any signs of anger to Bunnidharma.