evangelist cleric.
gets cleric buffs and knows the basic bard bluffs, so lends itself towards support.
loses some effectivness from reduced channeling, so not perfect.
I'm running one who follows Cayden Cailen, the Adventurer's God (TM). He preaches character optimization and tactics as his divine word.
"Cayden says wear a masterwork buckler, there's no penalty!"
"In the word of C.C., flank first, then sneak attack!"
Halfling with the helpful trait. Consider adding Bodyguard on top of that.
Sounds like you want to be a bard. Look here for some optimization ideas/guides.
Spell options:
Vanish from the APG gives a sneaky rogue sneak attack without a flank.
Grease makes enemies fall down or drop weapons
Silent Image can duplicate a lot of other spell effects.
Message allows a whispered "walky-talky" type communication.
Fun personality quirk is up to you. I recommend that you look for some personal quirk of your own that is fun and play it way out of porportion.
My sense of humor tends toward puns and the bizarre. Alice in Wonderland is high fiction in my book. In a Shackled City campaign, I took that personal quirk to make a bard that was just a little bit crazy and wacky. He heard voices (and held conversations with them), he had no concept of personal boundaries, he often cheered for the enemy (while always doing his best to help his own party win), and (when we ended the campaign) was actively trying to start a romantic involvement with the leader of a rival party.