Find a local grass-fed butcher who will male offal sausages and patties. You can also add organ meat to ground meat and it is less noticeable. Alternatively, good oils and spices go a long way. I use coconut oil, tallow and parsley to flavor most of my meats. If you can at least manage liver and bone marrow, that's a pretty good smattering of what an animal can provide. Add a little seafood and lots of cooked greens and some seaweed and you're not missing much of anything nutritionally.
Seafood is great, too, especially if you eat the whole fish. Canned mackerel is the whole fish minus the head. You can eat the spine, skin and everything dark inside the belly pretty easily. Especially with some mustard. Consider it a gateway food for beginning carnivores. To be honest, I'm still in the process of getting my hands on a regular supply of grass-fed organ meats. Liver, fat and marrow are the easiest to find for me. But, thanks to money, it's canned fish for now.
Sorry, no, ox tail is meat, fat and bone. If you get the neural cord out and eat it, that's a pretty good step in the right direction.
Steak, eggs, potatoes - fruits, nuts, berries and forage. Coconut milk and potent herbs and spices. Tea instead of coffee now and teeny amounts of kelp daily. Let's see how this does! Not really had dairy much, and gut seems better for it.