Although i've personally tried out the "Creature Follower" mod, it has issues.
If you have a companion already, use the console commands to spawn the creature to make it follow you, then dismiss the follower, everything is fine. But if you try making said companion try to follow you again, he / she / it will refuse until you delete the creature follower first. At least that's the issue I faced everytime, so I decided to never make people wait for me / dismiss them.
I'm just hoping that Bethesda releases the kit to let people really go crazy in modding Fallout 4. They did it with Skyrim, why not this game too?