Hey Jack!
I have heard Grape seed and Rice bran oil are more stable at higher cooking temperatures and better for cooking. Olive oil is best unrefined and unheated and used within a year of being pressed. In Europe it is often mixed (adulterated) with other cheaper lesser quality oils and sold as 100% olive oil.
I don’t think canola is healthy, I won’t use it. People say its healthy and nutty, I think it tastes rancid. It used to be used as an industrial oil, they reduced the dangerous constituent, but only reduced. I’ll get my omega 3s from fish.
You do have to cook at a lower temperature with olive oil. Only get extra virgin olive oil if you are concerned about adulterated forms.
There are Omega 3s in extra virgin olive oil.