I'm still waiting for people to give me their thoughts on my timeline, but, in the meantime, I've decided that the writers' stated placement of 1750 for On Stranger Tides kind of pushes things way too late and doesn't make a lot of sense with regards to the way that things end up (or sound like they're going to end up) playing themselves out, so I went back and revised the dates and added a few key events:
1720: The Curse of the Black Pearl (main plot)
1721: Dead Man's Chest (main plot); At World's End (main plot)
1726: On Stranger Tides (main plot)
1731: At World's End (final scene)
1736: Dead Men Tell No Tales*
I'm choosing to assume that "Henry", if he's in fact William Turner III, is probably not going to be older than 20, which is why I have DMTNT slated for 1736.