So I made a Guy in blender and imported him to UE4 with no animations and only 2 errors, none of which really got in the way. I tried to give the same guy a walking animation and import that animation to UE4 from blender. His foot got all messed up and for some reason the animation itself was down scaled.
This is the guy without animations.
Try to use FBX 6.1 Version exporter, only export the selected mesh, then the selected animations separate. When you import the animations define Animation Name.