FFT:WotL IS a PSX SRPG! And it's certainly not entry level because it can be much more of a challenge than others in the genre, has a relatively complex range of jobs and relies a bit upon being familiar with strategy employed in these games. In comparison Disgaea is a doddle and Jean D'Arc really is entry level. Phantom Brave is an anomaly because of the troop "summoning" mechanic.
Jeanne D'Arc is if anything a better experience than FFT for many...and i don't understand your complaints about graphics when it's certainly more attractive than WotL, and story when the plot is much less convoluted. Sure it has less intrigue but it's easier to empathise with the characters.
As for five decent SRPG's -
Disgaea Afternoon of Darkness - Too repetitive and not rewarding enough for the time spent playing. This goes for all Disgaea
Disgaea 2 Dark Hero Days
Phantom Brave The Hermuda Triangle - Could not stand this game, the gameplay just wasn't for me
La Pucelle Ragnarok - is this in english?
Wild Arms XF - lol, this game sucks, it really does...and you know it too
Jeanne D'Arc - next
FF WotL - good game, but a bit imba
Valkyria Chronicles II - dislike this game's gameplay mechanics
R Type Tactics - I don't play aircraft-heavy games
Tactics Ogre - good game
Queens Blade Spiral Chaos - english please, come again. thank you
Ragnarok Tactics - didn't try this one yet. The gameplay seems slow and limited
They're things off the top of my head that are interesting. That excludes about a billion others like
Gungnir
Blazing Souls Accelate
Spectral Souls Resurrection of the Ethereal Empire
Mytran Wars
Generation of Chaos
Aedis Eclipse
Field Commander
Warhammer 40000 Squad Command
Etc, etc, etc....as in there's still more on the PSP. When you take into account the PSP as a whole, then the PSP is NOT short of SRPG's in any way shape or form. Then you have the PSX variants on top of that....why wouldn't you class WotL as a PSX game when essentially that's all it is?