Hamfast Gamgee
Tol Eressea
Or possibly Strider or possibly any of the Dunedain? The reason that I ask this is that although it says that the Dunedain's role was to keep the simple folk of the Shire and Bree safe from fear which had to mean them not knowing about the perils of the wild, but hobbits like Maggot did seem exceptional. After all he was visited by Tom Bombadil so he did know a bit about the outside world. Maggot was, I think, aware of the existence of the Rangers, though how much he knew about their role and origins is open to question. Even if later on Aragorn issued a decree that men should not enter the Shire was this always the case? Aragorn had been everywhere else, so I'm not sure that he would have wanted to have left the Shire of his list of travels. And Maggot been near the border might well have found it useful to know of the Rangers role. Then again of course, thinking about it, is it just Maggot that would have known about the outside world. All right some like Butterbur where obviously not but others might well have been. Some like the heads of the Tooks or the Brandybucks might have been aware. Or even possibly the Mayor of the Shire. Maybe when he became Mayor one of the Rangers took the Mayor aside and had a little word about the outside world! I find it hard to believe that the lives of the Rangers and the townsfolk of Bree where totally separate. There must have been some intermingling. People been people. At least that is how I see it. Quite how much, though, is what is open to question.