Mine has Waterfall, Earthquake, Endeavor and Avalanche:
All of them are physical, because it has higher attack than sp.attack. Avalanche has basic power 60 but double if already hurt that turn, but mine has low speed too. Avalanche is good combination with Hammer Arm too, because it's lowering speed (if I remember well). So:
Waterfall: May flinch, STAB, high power, great accuracy
Earthquake: STAB, great power, great accuracy
Endeavor: very good but may not be so great with low speed
Avalanche: cover Grass-weakness, great accuracy, very good power with low speed