Some people said that King Bumi is the best earthbender. Some said that Toph is the best earthbender. Most people are not too sure who is the best. Get go and see who is the most powerful earthbender.
King BumiLet start with King Bumi. I can't explain about Bumi because he is a minor character. But I explain some details about him. Bumi knows how to earthbend, but that is only skill that he can do. He can take down the Fire Nation who took control of Omashu all by himself during the Day of the Black Sun! Whenever Bumi earthbending, you rarely see his handicap on his face. About the Jennomite, he can bend by earthbending. King Bumi might be crazy, but he is a mad genius.
TophToph, the Blind Bandit, had more skills than Bumi. She can metalbending, eartbending, and sandbending. Let begin with metalbending. Toph is the only one who discovers metalbending to utilize it. She made an armor from metal. (Go,Toph!) That's all I can say about metalbending.
Toph barely use sandbending in this series. She only use sandbending at the Ember Island when Team Avatar .
Earthbending is Toph's first bending. She learned how to earthbending when she was little. Toph was taught by the blind Badgermoles. She can "see" Her father, Lao Bei Fong, hired an eathbender instructor, Master Yu, to teach her only the basic moves. Toph already knows those, so then she secretly enter the contest, Earth Rumble VI, many times. That where she got her nickname.