Yangchen
Szeto
Kyoshi
Roku
not Kyoshi: we have 2 books about her. (The Rise & Shadow of Kyoshi.)
not Roku: we have 1 episode about his life story.(The Avatar and the Fire Lord.)
Sorry I wasn't upset. I was just saying loudly.
Yeah, Karuk would be very interesting. They can do an animated movie really and that would be great!
No the avatar after Korra would not be able to contact his past lives including Korra. Instead, Korra wrote her experiences in a book for the next avatar to use. There is an Avatar after Korra named Jimu. I would Like to know more about Szeto.
Movie Flame Youtube Channel posts a video explaining this.
Click here to watch:
that book is non-canon.
the next avatar can talk to korra.