Of those I played. I haven't seen much of FFXVI, and I saw a playthrough of FFXV but haven't played it, but while parts of it are cool, its second half makes it my least favorite from what I can tell. And XI and XIV are MMORPG's, and I haven't played or researched any sequels or spinoffs.

1. VII
2. VI
3. XII (Zodiac Age version, which seems superior to the original from what I can tell)
4. XIII
5. III (Pixel Remaster, other versions are frustratingly difficult from what I hear)
6. II
7. IX
8. V
9. IV
10. VIII
11. I
12. X