Sure. You'd have to be careful. But I think Harry has a tool that the Council never used. Imprison every warlock you intend to rehabilitate in Demonreach so they know the suffering they have caused. Teaching Molly that what she did was wrong was one of the hardest things for Harry to get across to her because she was "helping." Once a warlock's been imprisoned in Demonreach, they're probably much more likely to live a virtuous life.
Georgia is training to be a psychologist, she would be a good choice to help the kids in a Demonreach to rehabilitate, and to help those not so far gone through the BFS. I would expect the Paranetters to help identify major talents early to allow them to be taught before they go off the rails, so there should be less as a consequence. Basically Harry is in the position to compete with the White Council in North America, but nowhere else yet.
This means at some point the North American Wizards will need to choose.
You left out money. Harry is likely to use at least some of his diamonds (and probably Murphy’s) to endow the BFS, and I do believe that someone like paranoid Gary who is a low grade oracle can make outstanding investment decisions. Frankly if Harry let’s a Paranetter make investments for him, he may soon amass a fortune which would allow him to make serious investments, like taking control of a local pizza delivery chain, which would indeed make him the Za Lord.