Hanna has a point. Wild animals even in palaeo times were pretty lean. They had to be. If they were hugely fat, they would not have survived long against predators, plus they were forced to exercise. This makes it clear that fat isn't all that important a nutrient.
It is true that some organ-meats are very fatty, such as the brain, marrow and tongue, but those form only a small part of the overall body.
As for Loewenherz's comment re my "wishy-washy" accounts, what do you expect? I follow a far more varied diet than Lex, which is also subject to food-availability(that is, on rare occasions, I might, one week, not be able to buy any raw wild game or raw grassfed meats, so I might just eat raw fruits instead for those 7 days; another time I might eat only 100 percent raw meats for 5 days because I can't be bothered to go out and buy raw fruits etc.
Whatever the case, I think that raw fat is only an essential on a raw, zero-carb diet, and, even there, I think that the overall percentage of fat required is lower than the percentages quoted in Zero-Carb circles.