Entities between Ones and Bedlams and super-Force users

Are there some characters or entities between Father, Abeloth, Daughter and Son, and Bedlam Spirits, and people like Luke, Yoda, and Palpatine?

I sometimes see mention for Waru, Force Priestesses. ARe there more?

What's so powerful about Force Priestesses too?

The FP seem to know how to become a Force ghost, they taught both Yoda and Qui-Gon how to be one.

That’s all I remember of them honestly.

Question 1: Yes, there's Waru, Yuuzhan'tar, Zonama Sekot.

Question 2: They are part of the Force planet, the hidden center of the Force, kinda like Mortis, and they're part of it.

Originally posted by BazookaMaster
What's so powerful about Force Priestesses too?