After a day of intensive scrutiny I decided to update people on the debunking of Ana Bray as the Stranger but the suggestion that Elsie Bray, mentioned in the lore, "disappeared" led me to a new conclusion.
My original theory was roughly this: Ana is the stranger because her charm is part of the no time to explain quest and she likely had access to the technology to turn herself Exo. Her lack of description in lore items lead me to the conclusion she would be a good candidate.
However the lore has small tidbits pointing out she died at twilight gap as a guardian. So probably not Ana. However Elsie, is someone with next to no Lore about her, has no recorded death, and anything speculated about her is pretty open ended. So as of now, Ana Bray is almost definitely not the Stranger, unless we have been lied to about her death. Elsie Bray on the other hand, potentially her daughter, sister, niece or decendent is capable of fitting the same bill. My new theory is the same as the old one just with Elsie Bray instead of Ana.
So Lore monsters go nuts, I'm as interested in getting rid of wrong answers as finding the right ones.