There's really not much to say here other than all oils except trans fat offer health benefits.
And it requires too much writing and reading to post about all this here.
I think you should read the dozens and dozens of articles on fats ALONE on this board or just pick up a nutrition metabolism book.
Monos and sats are best for cooking (eg, butter, lard, canola, olive, bacon grease).
EAT some fish.
Use polys for shakes and salads or whatever else.
Grasshopper: You need a more thorough education on nutrition as a WHOLE.
Also, fats are the easiest macronutrient to overconsume and when in a caloric surplus, excessive fat intake most prone to add to body fat gain.