waton, sorry I don't know when each of these guys started claiming to be special, but Gerrit Loesch did indicate in the biography he narrated for wt that he was anointed in 1968.
Here is how he put it:
We got married a year later, in April 1967, and we were allowed to continue in the traveling work together. The following year, I realized that by Jehovah’s undeserved kindness, he had adopted me as a spiritual son. Thus began a special relationship with my heavenly Father as well as with all those who, according to Romans 8:15, “cry out: ‘Abba, Father!’”
It's funny how he explained why he lost faith in the Catholic Church, as follows:
The Roman Catholic teaching of apostolic succession claims that there is an unbroken succession of popes in a line extending all the way back to the apostle Peter. (The church misinterprets Jesus’ words that are quoted at Matthew 16:18,19) Catholicism also claims that the pope is infallible in matters of doctrine when he speaks ex cathedra, or in an official capacity. I believed this and thought that if the pope, whom Catholics call Holy Father, is infallible in doctrinal matters and has proclaimed the Trinity to be true, then it must be true. But if he is not infallible, then the doctrine may be false. No wonder that for many Catholics the teaching of apostolic succession is the most important teaching, since the correctness or incorrectness of other Catholic teachings hinges on it!
I wonder how he cannot see that this undercuts his authority to control others.