The odd thing about this whole aggressive cock business is, if you've got free range chickens you want the cock to be aggressive. There isn't a lot of point in having a cock that says to a hawk 'hey man, lets sit down and have a talk about this'.
The problem seems to be when the cock is aggressive towards humans.
Well, we are predators too.
What needs to be done is, either keep away from the cock and let him get on with it, or convince the cock you're one of the good guys.
One way is if the hens think you're a good guy.
If you can override his bossing of the hens then that seems to make the cock think.
I've got two lovely cocks here. One runs from his own shadow and the other is currently being taught to fight by his daughter (it's absolutely true). He still isn't up to a predator attack, but at least now he doesn't get bullied by other cocks and the Muscoveys.
I think he'll learn but it takes time.
Regarding children (?) I don't let children near the chickens. I point out that they are not toys and not little pussy cats either.