Adding to the list:
Yggdra Union is very fun IS-like SRPG done by Atlus.
La Pucelle and Soul Nomad are, in my opinion, NIS's best games.
Energy Breaker is one of those rare gems that still fly under the radar, but it was fan-translated last year which is great.
And if you want to take a chance at real-time, play Ogre Battle or the N64 sequel. If you don't want to take a chance, play Ogre Battle 64 anyway, because it's a 10/10 game.