How to upgrade Monochrome Darth Vader display

Hi all, I have been trying to gather all the different possible Monochrome Darth Vaders out there (86) and get them all sorted in my Dislplay Case. (These all have the official LEGO stamp even though I know the "nightshift collection" is hardly official :p) I also have the Chrome Darth Vader Sealed in the poly bag and the Redemption and Gingerbread Vader still in the sets but I'm not 100% satisfied on my arrangement in my Display Case. I'm hoping for some suggestions using this case and/or...