Best way to NPC in 2018?

Hello,
i started to think about NPC's. I have some basic NPC's drivin around Los Santos but you know ... Those can't do anything. So, i want to make just one NPC which stand on some position and attack near player's with minigun.

What is the best option to make NPC like this? Do i need to download bigass plugins ect.? Is anyone working on new NPC systems?

Thanks.