There is some monster that works like a swarm of bodies?

I want to ask if someboday have design a monster that works like a swarm of bodies. Not undead but simply human, dwarf, etc bodies that are corrupted or something similar. I want that this monster works like a swarm in such a way can move like a flow until push and destroy windows or doors of a house (example).

Something without Intelligence, like an horde that kill everithing. The monster must be easy to hit for player, but after have killed one bodies, another is ready. In my mind this swarm if made of singular bodies with someone that is able to fuse with another to create a terrifing tangle.

Can you suggest a monsetr like this or do you have a character sheet for a monster like this?