You can use any item as a hat on your Copper Golems!

Copper Nugget in Offhand, Item of your choice in Mainhand:

Places the block form on top of the Copper Golem's head

Doesn't place anything if there is no block form

Copper Nugget in Mainhand, Item of your choice in Offhand:

Places the item form behind the Copper Golem's rod

If there is no item form, places the block form of the item onto the Copper Golem's head

!Copper Golem getting a Hat

!Copper Golem getting a Lower Hat

Only consumes the nugget and keeps your item

Contact me on Discord for any issues! @hexasan