I have been noodling around with replaying Triangle Strategy recently and I have to say that it dodges the "generic jrpg cast" thing pretty well.

There is a touch of that, but it's pretty mild. The story is pretty game of thronesy, so if that's not your cup of tea it might still not feel great, but there are some characters who are decent people unlike game of thrones, just the whole scheming nobles thing, not the really unsavory parts.

Also I think the youngest MCs are in their early 20s, and rather than typical youth fetishizing "world's best swordsman and negotiator at 15 years old" thing, those characters are generally struggling with having too much responsibility thrust on them too young.