Have you tried no carb no more than 15% protein and less than 4% PUFAs yet? Omega 6 causes leptin resistance, heightened cortisol, inflammation, etc which is why a lot of people find nuts to be fattening disproportionately to their total calories.
Essentially that would mean grass fed beef, coconut oil, erm, yeah that's about it! i think supplements would be needed.
Other than that I got nothing. Sounds frustrating!
Stabbing conventional wisdom in its face.
Anyone who wants to talk nutrition should PM me!