Glancing over this thread, I agree whole-heartedly with the suggestions of Breath of Fire III and Kessen. While probably not a top-5 on the PS1, it was definitely close, but was unfortunately overshadowed by the FFs (like a lot of other series such as Lunar and Suikoden were). BoF III is a great game.

Kessen is just a fun RTS. I personally liked the first more than the second.