Suggest me books like the Avatar the last Airbender

So as the new Avatar movie is a hot topic now, my inner dormant avatar fan has risen again and now I’m desperately searching for the same high I got from watching the series as a kid.

Are there any books similar to this series?

Like the main features I loved in ATLA was like

1. The friendship (Gaang) and the whole found family vibe it gave

2. The main character being the sole reason of hope among the characters like how Aang being the avatar was like a literal beacon of hope to a world that had accepted its defeat.

Like how people thought that their last hope against the fire nation was lost but then he came back.

3. How a small group of people stood against a very powerful tyrant and empire that had conquered so many regions and tribes.

4. It had characters that were so lovable and the relationship between them were so beautiful.

5. The whole uprising and revolution kind of plot

Are there any book suggestions like this?

It would be nice if it is a long series and not just a single novel or a duology. But then all suggestions are welcome.

I’m currently reading the Throne of Glass series and it is giving kind of the ATLA vibe but then the whole problem with the author just makes me not connect to it much.