All of these are really good examples of writing a good email, except the bottom left one.
The "wrong" example is perfectly fine, and the "correct" example is pretty rude unless you're a project manager addressing your team. Even if you were a project manager, it's still pretty rude.
I totally agree, bottom left one screams of project manager that scheduled too much in your sprint and they're pressuring you to finish everything asap
Also it depends on if the person holding you up is the client or some other employee at your company.
Often it is the client the holding you up. In which case the best thing to do is send them an email about a week before the actual target date just to remind them, especially if they've done this before.