Basically, Adam was the first. But he did not have a group with which he would develop this technique. In those days, it was not needed because egoism in humanity was still too small.
The next level of egoism was revealed by Abraham, but it also was small since it was enough for him and his disciples to just connect with each other. The most serious egoism was revealed during the period called the Egyptian exile.
Question: And the souls of such great Kabbalists as Adam HaRishon, Abraham, and Rashbi are somehow connected with each other?
Answer: Yes. These are souls that constantly manifest in humanity, as well as the main upper force that must manifest in us in order to spread the method of correction among us to organize us. These souls descend into our world as messengers to teach spiritual methods.
They don’t even correct themselves, they just teach others how to correct. Therefore, it cannot be said that they themselves have reached their level. But they are not like everyone else. These are special souls that are engaged in carrying out the “policy” of the Creator in this world.
From KabTV’s “The Power of The Book of Zohar” #21