You are right to be concerned! There does come a point when too much body is too much body. Your heart has to work very hard to pump all that blood, whether it's through muscle or fat! While your biomarkers are probably amazing and you are clearly doing an amazing job of taking care of yourself, I agree you should focus on not gaining much more mass. Simply put, I think if you eat less protein, just a little less, you'll stop gaining. Are you drinking any muscle drinks? Drop those. And then, if you just want to burn some muscle away, you can always take up a little distance running for a short time, (though that's a controversial idea) it's what I used to whittle my massive bicycle legs back down to normal.
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.