I think that Aternos could add this mod, Guard Villagers.
-Mod name: Guard Villagers
-Link: https://www.curseforge.com/minecraft/mc-mods/guard-villagers
-Adds: This mod adds a new villager type, the guard. This type of villager protects the village with its weapons from Illagers, Zombies...
This mod would be really good!
Thank you!