I like the banshee and the wraith gliding effect. Very dynamic and crippy.
The giant bat is cool but the pose of the ghoul is odd. The ghoul looks to be a good sculpt anyway.
The "dragon" is a joke, it looks like a old wyvern walking with a stick. The legs position makes it impossible for it to walk, the dynamic of the arms/wings is lousy...
I think you should be able to come up with a decent pose fro the dragon as well (more like the giant bat) but now it's very mehhhhh
Porkix