Hi there. I also use the EZComplete from Foodfurlife that was linked above. I cannot overemphasize the importance of following their transition guidelines. It seems overly cautious, and since my cat seemed to like the food, I jumped right in and just gave him a bunch of it. Sure enough, after a day, he turned his nose up. When I backed off and transitioned the way they tell you to, he played along nicely and that is now his main food. I use it with chicken, turkey, lamb (when I can get it on sale), and occasionally a small batch of beef (beef isn't great for them, so I limit that to just once in awhile).
I do still use commercial raw as well, and feed Vital Essentials, Primal, and Natural Pet Pantry (I think they might just be local here in Seattle though).
And to clarify from your original post -- you only need to add a supplement if you are making your own raw. If you buy a raw food at the store, they should all be complete already.