My idea on this topic would be:
Druid 4/ Urban Barbarian 2/ Rage Chemist 2
So:
20 Base
4 morale(Be sure to take the extra rage feat)
2 levels
6 alchemy
4 Enchantment
6 Size(If you can become a Huge animal), (You would need the feat that will make your Wild Shape to stack with up to 4 non Druis levels)
The Couragious weapon ability could help you increase the morale bonus to greater heights.