Aang

Aang was a male Air Nomad born in 12 BG and the Avatar during the Hundred Year War, succeeding Avatar Rok and preceding Avatar Korra. As the Avatar of his time, he was the only person capable of using all four bending arts: airbending, waterbending, earthbending, and firebending. He was also one of a select few Avatars and one of the first in many cycles to learn the ancient art of energybending and the first Avatar known to have actively used the technique.