Well ... it's been seven years since I wrote the prophecies out for you all to see. I'm still seeing no 'Great French King', although there are more than a few people who might fit the antichrist bill ... Still, I'm bumping this for those folks who weren't around seven years ago when I first posted it.

The earlier prophecies in your list were coming before "France" in the modern sense really existed.
Early references to "Franks" would have been to the Germanic tribe which came to dominate France and Germany.
Charlemagne was crowned Emperor in 800. When his empire broke up again, the western portion of it became France.
The Holy Roman Empire was built up by Charlemagne's German successors, but the French always felt that they were his real successors, so prophecies about a future French king can be regarded as alternatives to prophecies about a future Emperor.

You don't give an exact year for the prophecy of St John Vianney. From the content, I would guess that it was written in the middle of the Franco-Prussian war of 1870 and predicting an optimistic end to that war. In fact the French government made peace, instead of crushing the Prussians, and then they crushed the Communards of Paris, who did not spread through France after all.