I don't have access to all the sources referenced here, and I'm still learning PF (pr. DnD3.5), but I'm thinking that Skald (Advanced Classes) could be a pretty nifty base class for a related build concept:
Cha magic and Inspired Rage grants bonuses (and thus new choices, oh you freedom fighter, you.) to whoever is present rather than controlling them, per se.
"Throw off your oppressors! Fight for your freedom!"
The ability to cast a spell of any type once a day is useful, especially for item crafters.
Alter Self is still on the bard spell list, and it's utility here is obvious. (so are Silent Image, Magic Mouth, and assorted other nice effects for this including Glibness and Eyebite.)
This would make this more of a debuffing buffer that can wade on in. If your allies use Rage features, this would be particularly potent.