I would agree with you except 6, which I have never played.
Ya'll are nuts. FF8 is at least top 3. Some ppl don't like the time-compressing stuff (I get it), but there's so much more. Blue skies, blue waters, grassy world/continent, good music = at least 8/10. Add in triple triad and that's 9/10. Finally, put in Rinoa and it's 10/10.
As for FFX, this is well-deserved. Incredible game world and music. I bought this game at least 10 times across all formats except PC (Ps2, PSP Vita, PS3, PS4, Switch, Digital). This was a FUN journey through Spira, not depressing/uneventful/lame like FF13/FF15.