1-6 is sorta held down by having 1,3 and 5 there.
That said, while not my favorite. I would have to say objectively, Final Fantasy 4 has the best story of any final fantasy game.
The theme of past sin and redemption is so interwoven into that games core message and told through pretty much every main characters story, it's downright frightening.
It's writing level is practically that of a good play.
From a stylistic and technical perspective it's really quite amazing.
other FF games, like 6 had great stories, but they just weren't so internally consistant and on point at every step.
Think of it this way. List the final fantasy games and ask yourself "What was the main theme of the game."
What was the game trying to teach me about humanity.
