I have a few suggestions:
Serious:
-Spear: A thrusting weapon (obviously) with a fairly small collision box, but has high penetration;
-Sling: Low damage, but has high projectile speed and staggers opponents;
-Shurikens: high projectile speed, somewhat better damage than the sling, useful for severing limbs;
-Ax: Differentiated from the sword with a longer reach, but comparatively smaller collision box;
Not so serious:
-Buzzaxe: Because Krieg;
-Power Fist: 'Nuff said;
As a final note, I'd like to say that what you're doing here is amazing, and I look forward to this game's future development.