I think pose depends on composition. There's no armor and wings, so it's hard to predict how it all will be work together.
Top part of "C" and all "B" is epic. I would also try to combine top part from B with D pose (but with head from D, looking on top).
G is interesting too. I would try to add bit more dynamic here.
H and I - nice, but a little shriveled, tight for illustration, imo.
Anyway, very cool anatomy and dynamic in all your sketches, really nice.
Just need a bit more info about illustration to say something specific.