Well Barb/Druid combos would actually be pretty useful if you could rage while Wildshaped - a shaper's biggest problem is trying to get a decent AB. Considering rage stacks with other bonuses, Barb levels would be a good choice for that very feature, plus the DR, high BAB, high HPs and movement speed would never hurt for a shaper to have. Would also make some of those Barb/Divine hybrid PRCs a cool feature to add (I'm pretty sure they exist but I don't have any books on me).
The main Druid shape I use is the Winter Wolf which only requires Druid 10 (or Lion of Talisid 8) adding 13 levels of Monk to the build wouldn't be so bad if you could use Blazing Aura. BA's wis requirement which is usually a killer in anyh melee build isn't a problem for a shaper so it would actually have a use for once beyond Shuriken, the Monk AC and Greater Flurry are already great benefits to a Shaper and with Improived KD and Expose Weakness being usable (What about stunning Fist?) more Monk levels is going to be a reasonable choice. Adding Blazing Aura to the mix would benefit a Shaper heaps considering they generally have a huge Wisdom score. Druid 10 and Monk 13 still leaves 7 levels to play with which isn't so bad - I have a few ideas in mind for the Monk heavy shaper that would have potential.
You are probably right about Feint, it won't get a lot of use. I have some builds with 5 Invisible Blade levels that still wouldn't even use it, Feint sucks so badly it isn't a huge priority for any build BUT if I were going to make a feinter, I would like it to be a Shaper. As a Shaper I could boost my Charisma without sacrificing my AB and have a Bluff skill high enough to make Feint (almost) worth using. With Charisma being a potential primary stat, what about making Divine Shield usable? With Sirine's Grace and the upcoming Verdant Prince, adding Divine Shield to the mix would be truely awesome.
To summarise: Unless there is a heap of work involved and you really do need to keep the list short, I'd still like the feats I suggested to be included (I don't care as much about Feint if it is time consuming) but I would like to add Stunning Fist and Divine Shield to the mix (again, not so much for the Divine Shield if it is time consuming - and I think even I would feel kind of cheesy maxing out my charisma and adding it to my AC three times…).
To summarise my summary: My preference for feats to be usable in Wildshape would go in this order with most desired at the start:
Oaken Resilience
Expose Weakness
(Improved) Knockdown
Stunning Fist
Barbarian Rage
Sacred Flames
Blazing Aura
(Improved) Disarm
Elephant's Hide
Feint
Touch of Healing
Divine Shield
Acidic Splatter
Clap of Thunder
Dragon's Breath
Whirldwind (Can't imagine many Druids bothering to meet the requirements for this one)
I also took the liberty of adding Oaken Resilience to the list, don't worry I won't do a "to summarise the summary of my summary" paragraph.