How do I increase Mob follow and attack range?

Hello, I was wondering if there was a way to increase a mob's awareness bubble or range so that it could detect and pursue mobs from far away, as well as making long-ranged mobs able to shoot from further away too. Since I use a lot of really large models for mobs, they don't really notice other mobs unless you stand right under them. I want change that and make them come after you from a much further distance, like how zombies can sense villages from further away. (But further)