lol i totally forgot about him. yea with him in mind there is no doubt that generally it is possible for an Apostle to make minions out of humans.Don't you remember Zondark?
I wonder if Miura would bring God-like creatures to the world now, considering that there could be people that believe in their God. I suppose the creatures that appeared now were those that resided in layers less or equal to Ganishka's layer ("the ultimate unknown"), so maybe some demigods are possible (not like Apostles).