Name every single item that can be obtained naturally through a mob drop in Minecraft.
Includes all items that mobs are able to drop naturally. This means items mobs drop after player manipulation (e.g. items a Zombie picks up) are excluded. Some items have explanations on how they are obtained, if necessary.
My source was mostly Minecraft Wiki. Some drops had conflicting information (armor worn by Husks, Drowned, etc. and pumpkins worn by mobs during Halloween), which I tested myself.
Mobs that don't drop anything aren't listed. Feel free to comment if some inclusions and exclusions seem weird or inconsistent.
Ghasts now drop the Tears music sisc when getting killed by a return to sender. Copper Golems exist now and drop copper ingots. Bogged also drop the mushrooms on their head when sheared, and including Mooshroom mushrooms/Snow Golem pumpkins is strange when the milk/stew drops are already filled in.
It's been over a year since the last update, and as the 1.22 release probably isn't dropping in a while, I went ahead and updated the quiz. Thanks for noting me. The reason I included mushrooms but not milk or stew is because mushrooms physically drop when obtaining them.
Mobs that don't drop anything aren't listed. Feel free to comment if some inclusions and exclusions seem weird or inconsistent.