Absolutely, without a single doubt in every ventricle of my beating heart, the best JRPG on the GameCube; imho the Clair Obscur of the system. Super interesting card-based battle system, and a real-time inventory system (apples will go from ripe to rotten if not used, and bamboo shoots will mature into full stalks, etc.). Great story, cool world, amazing soundtrack. Also now remastered on Steam with the sequel/prequel!
Also an honorary mention of Lost Odyssey -- phenomenal game trapped on the 360 still.