To be honest, I have played almost all the games people have mentioned except for a couple, but this is what my list of games I haven't played so far looks like:

Jeanne D'Arc
Baldur's Gate II
Beyond Good and Evil
DQ VIII(I played the very beginning when I rented it but did not get too far)
The Personas
Rogue Galaxy
Disgaea
Eternal Sonata
FFXII: Revenant Wings
The World Ends With You