Shield of Destiny, Adamant Shield and Journal Shield you can put in the shield slot. However it's impossible to do it with Majestic Shield, since it's treated more like "tapestry" (it is hangable).
The Epic Wisdom you can put in the helmet slot.
Midnight Panther Doll you can put in the arrow/light slot.
I've checked also Epaminondas Doll, Memory Box, Ferumbras Doll, Crunor's Heart, Yellow Rose and Nightmare Doll - we can not put it in any slot.
We can not put in equip slot any of trophy (warrior/excellence) or medal.