How can you create an invisible armorstand with a visible head in Minecraft? If commands don't work, then plugins…
/ summon armor_stand ~ ~ ~ {Invisible: 1b, ArmorItems: [{}, {}, {}, {id: "player_head", Count: 1b, tag: {SkullOwner: "Brockdish"}}], HandItems: [{ }, {}]}
https://haselkern.com/Minecraft-ArmorStand/
Then a completely invisible armor stand is spawned with an invisible head