Hey folks I have 3 more mobs to vote on! The one that wins will be added in an addon with the other one
Mob 1: The Sculk Slug.
Down in the deep dark lives the Sculk Slug. A passive mob that you can saddle and ride around the deep dark silently. Moves at the speed that you would be with swift sneak 2, but moves silently and won't trigger shriekers or sensors when walking over them. A good way to get around the deep dark! Also will leave behind a trail of Sculk veins and will take damage when brought outside of the Sculk biome
Mob 2: The Moss Muncher.
Living in the humidity of the Mossy Caves, the Moss Muncher is a very hungry plant! When it is hungry, it will open its mouth and expose an enticing fake diamond. If Any entity within it's attack range gets too close, it will latch onto it and do lethal poison damage to it until it dies, consuming and storing its items until it's killed. It will be passive until it is hungry again. You can pick it up with sheers and if you plant it on a chest the items it eats will go into it. Good for farms!
Mob 3: The Frost Bite.
Spawning in icy cold biomes, this menacing looking mob is actually very useful. Feed it Ice to tame it and it will automatically attack all strays and cold biome hostile mobs around it. The sharp spikes on its back deal thorns damage as well as damage anything that falls onto it or jumps on it (like a stalagmite) This mob also will not sink in powdered snow, and can not freeze to death.
Which do you want added to the game?