I like #1 in the second set. The pale lavender in the background goes best with your borders, yet the fabric remains "in the background" without detracting from the deer. The green is just enough to give a forest feel.
I assume you are going to add stitching around your fused fabrics in the deer. If you do, then you can outline the antlers in a light brown or grey so that the tips don't disappear. Or, you can get a very fine fabric pen and define them by outlining them using that technique. It's also a good way to change the colour of a thread that you've used to free motion quilt, say on the deer, if you decide you don't like it.
Finally, I would free motion quilt a few "ghost" trees with bare branches using lavender or green (possibly variegated) in the background. Draw them first with one of those disappearing markers to see if you like the effect.