Personally the 1st thing that comes to mind is Summon Night Tears Crown, but its japanese...I'm waiting for a translation. I like the gameplay and the story is pretty interesting to me (well at least up to the point I got to)
I can't really think of any good english turned-based rpg so maybe someone can help you better than me.
Dragon Quest series
Final Fantasy series
Might & Magic: Clash of Heroes
From the Abyss
Glory of Heracles
Shin Megami Tensei series
Dragon Ball Z: Attack of the Saiyans
Mario & Luigi series
Super Robot Taisen OG Saga Endless Frontier - I like how they did the women animations a bit erotic
Sonic Chronicles: The Dark Brotherhood
Kingdom Hearts series
I know it's a bit too much, but these are my favorites!