In my initial weight loss phase, fats came from eggs, bacon, sausage, liver, steak with the fat on, real butter, creme fraiche, sour cream, cheese (sometimes with butter on top), chicken skin, pork belly, salmon, beef tallow etc. Eating lots of real animal fat was the key for me. It controlled my hunger. It relieved inflammation in my joints. It improved my mood.
I'm not losing weight anymore and eat less fat than I used to, but I still eat real butter and triple-creme brie.
In my case, basically everything I thought I knew had to be turned upside-down and inside-out.
Female, 5'3", 50, Starting weight: 163lbs. Current weight: 135 (more or less).
I can squat 187.5lbs, press 75lbs and deadlift 200lbs