My favorite were the Masamune, Yoichi Bow, and Sage Staff (was that one of the legendary weapons? I forget). The Masamune because it dealt a lot of damage to enemies but didn't heal them like Excalibur, the Yoichi Bow because I think it was more powerful than the Artemis, even though it says the attack power on the Artemis is higher. And the Sage staff because you could instantly k/o the crystal monsters in the final area with the save point, those things are pretty annoying if your regular swords keep missing.

But the best weapons in my opinion are someone using tempest swords in each hand for x-attack, and someone double gripping a ragnarok.

But here's the stats of them