One of Grim Dawn’s largest mods is here: [REL] Grimarillion v94
This mod features the classes from Titan Quest and Diablo 3 (alongside some additional custom classes); what you are looking for is the Nature mastery from Titan Quest - it’s designed around wolves, nymphs, and is primarily a pet-centered class.
Also, yes I do hope that we get to use that great white wolf somewhere in GD; it’s way too cool not to incorporate into the game.