#9: This not that classic (10+ years old) japanese RPG has colorful NPCs joining your party, that you can subsequently control in combat.
#6: This RPG is a fusion of two beloved series.
6) Tokyo Mirage Sessions
And might as well take a stab at 9 now that I'm here:
9) Paper Mario: The Thousand-Year Door
- Switch - 24m
- PS5 - 15.5m
- Xbox Series - 10m