Hello there,
I noticed you did not have the Mod "Mob Blacklister" or I may have missed it if you did but the searches came up with no results.
What this mod does, is essentially control the spawning of certain mobs in the world/server. Take Creepers for example. If you want to remove them and play outside of peaceful mode or only want certain types of creatures to be able to spawn in the game.
Mod name: Mob Blacklister
Location: https://www.curseforge.com/minecraft/mc-mods/mob-blacklister
Thank you for your time and consideration
-Angel