All edible oils are healthy. Olive oil is considered to be the best oil in the world, but I would like to say sesame oil is as good as olive oil.
The only difference is the distribution of monounsaturated and omega-3 fatty acids. Olive oil has more monounsaturated and sesame has more omega-6 fatty acids. The important fatty acid in fish is also omega-3 fatty acids. Sunflower has more omega-6 fatty acids and canola is the mustard oil without smell.

Olive oil should not be heated above 70 degrees C and it could be used with salads.

For our Indian way of cooking sesame oil, coconut oil, groundnut oil and sunflower oil is good.

Oils are always healthy and it is in your hands to use them judiciously in such a way to get only the health benefits.

All plant oils have no cholesterol. Never forget 100 g oil has approximately 890 calories.