If you remove the alpha rooster, the lesser roosters will take his spot. Like a dictator, not every leader is ideal. The new leader could be worse than your other boys.
The cute following you isnt his being nice, he is being protective and watchful of his territory. He is tolerating your presence. Now that he has gotten the courage to make his first move, he will likely continue the behavior.
Until he shows dangerous aggression, I would go out every morning and knab him and pick him up and carry him around for a few minutes. After a while, he will grow to hate being picked up and hopefully will avoid you. If not, he will do the opposite and become more aggressive. There is no grey area with a rooster. Either he is going to be nasty or he is going to be nice. There is no in between. His personality is already set. It is already in his head how he wants to be and its just a matter of time before he sets off and hurts someone seriously if he chooses to be nasty. If you show your dominance while he is young, he may realize he isnt "all that", if you are lucky. But if you show fear and hesitation, hes going to sense that and use it to boss you around. He doesnt know he is the perfect size to fit in the roaster. He thinks he is King Kong.
Its up to you to decide how far you are willing to let him go.