Since we’re comparing feats for no reason. Aang mastered lightning redirection, invented an entirely new airbending technique, became the youngest airbending master of his time, was the first confirmed Avatar to use seismic sense, and defeated Ozai during Sozin’s Comet without killing him. He also mastered energybending, took away Ozai’s bending, and restored KORRA’S bending after Amon took it away. Korra has incredible feats, but let’s not pretend Aang didn’t accomplish anything just because we never saw him metal-bend or used spirit bending and Aang wasn’t carried by any past lives. Put him against any Korra villain and he would still come out on top.