Over 5 years ago (Wow, time flies) I uploaded my first follower mod, Christine, and over the next 2 years I eventually created a mod for each of the core companions from every DLC. Since then, many people have been asking for a single .esp solution, as the original mods constituted a hefty 8 .esps. Those mods were also fairly poorly made. All those issues end today. This mod is a complete from scratch remake of each of those mods, with the exception of Roxie and Lonesome Road ED-E , updated versions of which are instead included in CFEE - Companion Overhaul, another mod of mine. This mod allows you to recruit fully-voiced, fully functioning versions of Dog, God, the merged Dog & God (referred to from here as Dog/God), Dean Domino, Christine, Follows-Chalk, Waking Cloud & Joshua Graham. Some of these companions, such as Christine, had perks that only really made sense within the DLCs, in cases such as these, I have given them a new perk, with uses outside of the DLCs. 

All companions featured are (should be) fully compatible with any mods altering their appearance, without the need for a patch

If, for any reason, you wish to download any of the original follower mods, they are linked below, but be warned they're not perfect and not being maintained:

Waking Cloud Follower
Dog and God Follower(s)
Lonesome Road ED-E Companion Expanded
Christine Follower
Dean Domino Follower
Follows-Chalk Follower
Roxie Follower Expanded
Joshua Graham Follower

Each companions features, how to obtain them and other notes:

Dog
To recruit Dog, you must complete Dead Money with Dog surviving and God dying
Dog can be found in Goodsprings cave and will agree to join you after a short exchange of dialogue
In addition to some of his regular dialogue being present, you can also ask Dog to teach you the Ghost Hunter perk if you missed it during Dead Money

God
To recruit God, you must complete Dead Money with God surviving and Dog dying
God can be found in Jacobstown Lodge and will agree to join you after a short exchange of dialogue

Dog/God
To recruit Dog/God, you must complete Dead Money and help merge Dog & God
Dog/God can be found in Jacobstown Lodge and will agree to join you after a short exchange of dialogue
Dog/God can also help you craft much like Veronica can
His voice lines are a combination of the small parts of Dog/God dialogue, and some of God's calmer lines

Dean Domino
To recruit Dean, you must complete Dead Money and he must survive
He can be found outside The Strip North Gate, near where Old Ben usually resides
If you didn't take his suit from him, he will be wearing it. If you did, he will wear a Dead Money jumpsuit
You can ask him to teach you the Sierra Madre Martini perk if you missed it
This mod also fixes the Dean Domino Blackmail Holotape

Christine
To recruit Christine, you must complete Dead Money, she must survive
She can be found in the Sierra Madre Suites (This mod includes a door into the Sierra Madre from the Abandoned Bunker, so you can easily go back for her if you have already left the Madre)
She is fully voiced, still using her new voice
She can teach you the Coin Operator perk if you missed it
If you speak to her in the vicinity of Veronica, there will be some special dialogue and a unique perk granted

Follows-Chalk
To recruit Follows-Chalk, you must complete Honest Hearts, he must survive
If you persuaded him to go see civilization, he will be found in Freeside. If not, he will be found at the Dead Horse Camp
He will not be wearing his Headdress as he gifted it to you at the end of the DLC

Waking Cloud
To recruit Waking Cloud, you must complete Honest Hearts, she must survive
If the Sorrows fled Zion, she will be found at Bitter Springs. Otherwise, she will be at the Sorrows Camp

Joshua Graham
To recruit Joshua, you must complete Honest Hearts, he must survive
He can be found at the Dead Horse camp

I hope you all find this mod to be satisfactory. There may be bugs my testing has not detected, but if there are I shall endeavor to fix them as soon as possible. Thank you very much for downloading, this series has been a labor of love for some time now and I'm glad to finally have a produced a mod that I'm really proud of.

Hope you enjoy :)