Character Animations in Blender 3D

I’m looking for a set of character animations. Would like basic mobility like Walking, Running, Jumping, crawling plus a few extras like Idle, falling, etc. The big constraint is that I would like the animations to use as little frames as possible and utilize some sort of interpolation to make the animations as smooth as it can. The idea is that these animations will later be processed into IK data and use on the web, so I would like to limit how much memory animation will use.

With success, I would rehire for extra sets of animations.