Thank you for all your comments and suggestions!
With something like this, I am afraid that it will be near impossible to please everyone with what character shows up,and which one(s) are missing, etc., but as I mentioned elsewhere, there is only so much room.
All I know for sure is that Frodo will be central, Sam will have a much stronger presence, Aragorn very strong ( pre-coronation, but in his kingly battle gear ) and of course Saroun's presence in the form of the eye of Barad-dur.
The above mentioned cluster will be the main focus, with the remaining elements flung outwards from the the center.
JV