Depends on the FF. FF VI, VII, X? Hard to think of much that's better - Suikoden II, really, and little besides. But FF IV, V, IX? Easy to name games better than those. Xenogears, Suikodens, Magna Carta, KOTOR, Jade Empire, Morrowind, yadda yadda yadda.

And of course, there are different styles of RPG anyway, so it can be hard to say with fairness. FFVIII is hardly the same kind of game as Vandal Hearts or Phantom Brave, in turn quite different from Jade Empire, itself dissimilar to Baldur's Gate, and then there's always MMOs to consider.

Out-and-out best RPG ever? Suikoden II. FFX in close second, had a shot at being first but Yuna. =(