➟ every story
Dragon seems like a good protector actually. They are strong, mostly. But I don't know if I could name a specific type that I think would be better at protecting me (or anything else for that matter). It's more based on the species, imo.
However, I could see how Water types would be good protectors. If anything came too close, they could just blast it away with Hydro Pump or Surf. A Blastoise as a protector would probably keep you safe against most things.