I was looking over the Druid, and wondered if anyone has built a non-monk grappling druid? Using Wild Shape to overcome the size limits and various ways to boost Strength. From my first look it seems feat availability is the big bottleneck.
I was looking at these feats:
Natural Spell
Shaping Focus <-- For Level Dips
Powerful Shape
Improved Grapple
Greater Grapple
Rapid Grapple
Hamatula Strike <--- Can a druid learn this when they get Constrict access?
Improved Unarmed Strike