Also to consider is what if neither Emma or Pinocchio or even Rumpel's son were the first to come to this reality.
I agree, there has to be others. I don't know if they are good, bad or will even come into play but I'm sure they are out there.
Also, when you consider that the stories are known in our world, the Grimm Brother's and other writers of these stories must have had either contact with FTL or contact with someone who knows the stories from FTL.
Gives me the timeline headache again
but we saw with Jefferson's hat that you can travel between different worlds and time.
I also think some of the magic items that were lost (like the fairies magic beans) ended up in our world.