Lego Star Wars Helmet Display Help Needed

Have a teak dining room set I inherited from my parents and convinced the designer I'm working with to display my Legos here. I own every single Star Wars helmet set but am struggling to figure out how to display them. Some factors to consider:

• 15 helmets but only have room for 12, so three will have to find a place elsewhere in the home
• The background is matte black, so there is some concern the black colored helmets could get washed out (Tie Fighter, Darth Vader, Dark Trooper, Kylo Ren)... out of these four, Kylo Ren has more silver and may washout less against the matte black

Potential groupings I have considered:

• OG Empire: Tie Fighter, Stormtrooper, Vader
• Bounty hunters: Jango Fett, Boba Fett, Mando
• Return of the Jedi: Scout Trooper, Leia's Boushh, Red Five
• Clone Wars: Commander Cody, Captain Rex... what is the third?

Open to any recommendations/suggestions for the collective braintrust. Thanks in advance!

All the helmets

Cabinet display where the helmets will go. The thought is to only display 12 in here (3 per cabinet) and find a place for the other 3 elsewhere in the home.