I'm with you. I eat fat, always have, and am not overweight. I don't believe in a no fat diet, our bodies were not meant for that.
The list you have are all the good fats and don't forget coconut oil and flax oil. The only thing with fish oil is you have to be careful of the manufacturer otherwise you could get contamination from mercury. Flax oil must be fresh and refrigerated. Other than that these kind of fats are good for you. I don't believe in shunning butter or some animal fat and have it in moderation. However too much saturated fat is bad and that is what causes inflammation as well as when the oil is heated at a high temperature like frying. IMO some people may be allergic to some kinds of fats so if you suspect a flare up then eliminate them and add one by one to see if you get a reaction.