Assuming you tolerate dairy, full fat and grass fed if you can are the way to go.
This is a great article.
http://chriskresser.com/still-think-...ce-think-again
We only have full fat in our house. We have Kalona Greek yogurt 3 grams carbs, 8 grams saturated fat per serving. Heavy cream, hard cheeses, full fat sour cream, butter of course. If you shop at Costco look and see if they Kerrygold butter in a three pack: delicious and mostly grass fed. Our Costco also had Kerrygold Dubliner cheese some of my favorite cheese in the world, kind of a mild, fruity cheddar. Loads of flavor.
Full fat dairy, great tasting and great for weight, heart disease, and cancer. Just a win win win food.
Note grass fed dairy particularly good for breast cancer as it is a great source of K2.