OK, I really like #11 and 12.
To modify #12:
The sun seems a little too big. Can you make the tree a little shorter still keeping the sun barely taller than the tree. Also to make the tree pop more as being backlit, darken the color a little to give more contrast.
Was thinking the tree looked a little lonely, can you pop in one of those shrubs (med size in #8) on each side?
Or maybe a grouping of 3 (#9) on ea side?