If you want an WRPG with a good battle system go play something like icewind dale thats based on the Dungeons and Dragons system. Or for something more action based and real time Diablo 2.
The reality is that two are very different beasts. JRPGs are in general more linear and lite on the actual roleplaying whereas WRPGs generally are more influenced by their pen and paper ancestors and thus focus on providing a blank slate character which the player melds to their liking and more choices.
Thats not always true though. Planescape torment has the nameless one as its main character whose very well fleshed out whilst allowing a huge amount of choices for the player. More roleplaying and the streangth of character development isn't always a tradeoff.
Anachronox on the other hand is a pc WRPG influenced by JRPG's and have a turn based system and is more linear.
Theres plenty of variety if you're willing to look for it.