If I sound mean then I'm sorry, but:
1. Armor Stands have been in the game for a long time.
2. The only mob head you can currently get in survival without mods is the Wither Skeleton Skull.(Because I have 1.11.2, and everyone else has 1.11.3 or 1.12 or whatever the current version is called.)
And 3. I could have both better decorations Mod Devin, and more creative decorations tigerclaws. Again, sorry if this is mean.