MORE Boss trophy items

We already have the dragon egg, the dragon head (kinda counts as an trophy item...) and the nether star... but why not add more. The whiter should definitely have a placeable boss item like the ender dragon. For example the wither spine. A placeable object with a probability of 1/3 og getting it when killing the wither. Other cool trophy item would be a placeble tothem of undying chalice that you can only get after defeating a raid (one with the max number of waves). Or even a elder guardian tail (I know he is not a boss.. ) It's kinda sad we only have a few trophy items in the game. Even though they have no purpose it would be nice to give placeable trophys to congratulate the players progress throughout the game.