So I have a campaign coming up with a rather generic story about a rebellion against a tyrannical king. There's more too it then that, but this is all you need to know. We're the rebellion, everyone else is working for the king or general citizens.
I'm looking to build a character around flavor and optimization, but I only want to optimize in one thing: I want to be incredibly good at manipulation. Whether it be magical, skill, or some sort of supernatural fix. Illusions might fit in here, but I'm not sure. I'd prefer to avoid cleric unless I can figure a way to make it more interesting as I don't like them, but there's so many choices I'm having a hard time choosing what would be the most fun.
Note this character is not meant to be optimized in every aspect, and I am willing to throw anything else out the window in combat. This is not a minmax campaign, so unless the character would instantly die, I'm willing to play a character who sucks at anything else, if not everything else.
The prerequisites of this character are he must be human or one of the elemental or infernal/celestial races sometimes born late into a human bloodline, as per the backstory I'm going for. He will be a bastard son of the king born out of wedlock. His mother having fallen ill, despite the fact he's eccentric, over the top and odd person, he began to use manipulative skills he gained either through charisma, magic, or some other means in order to help take care of her and himself. Not only ill, they were definitely impoverished. As time went on, poverty was no longer a problem due to his abilities, but his mother succumbed to illness and age and died unloved except for him. He, of course, blames the king. He shall not be telling the party about this, instead giving them a different reasonable form of motivation for being involved as it is personal. His real goal, of course being justice and/or revenge for him and his mother, and possibly the throne.
He need not be incredibly combat viable in terms of 'damage'. He tends to avoid that if he can. Also, I'd like to eventually find a way to avoid discern lies at higher levels if he's going off bluff skill, which is what I prefer over intimidate. Diplomacy would be a backup.