It's not the powers as much as the behavior of the character.
One obvious flaw just from the stats is, this character believes he's the king of the world, so to speak, so it's likely he'll be getting himself into trouble above his abilities to handle. Maybe not combat, but, for an example, the character may BELIEVE they can talk their way out of trouble, when they really can't.
Sure, a high WIS should offset that as a rule, but if you skirt the edge of what just might be doable, you're likely to end up in trouble quite enough.
Think roles played by charismatic actors, and what their character flaws were - Any role with Sean Connery, David Tennant as the Doctor, and so forth.
In "real world", a high Wis, Int, Cha character IS very good.
Also, if he has appropriately heroic traits, it will make him less annoying, if he goes out of his way to help people, for an example.
There are plenty of options, really. both of Jim Butcher's series have high int-wis-cha characters, who are far enough from perfect - and even if perfect, still entertaining.
You might consider looking at such things as the character's virtues and vices - say, virtues as in Exalted - compassion, temperance, valor, conviction, and give him a primary and secondary sin - pride and sloth, for an example.
Any idea what sort of a game it will be?