Add agriculture! Easily the most important and gave birth to all of the others since none of the others could be developed if you weren't able to establish yourself in one location with a reliable source of food.
I want to agree upon Language, but I do not classify it is an invention. Language is just an innate human development, as we are complex creatures with complex ways of communicating. A true invention that bettered humanity would have to be electricity, as most industry and daily life relies upon it. The creation of electricity is what fueled the industrial revolution. Music should not even be on this list. Music if mostly for entertainment, and sometimes for stimulus. Aircraft is just for military and transportation. Religion would not be considered an invention, and even if it was, some religions (Islam) have done a lot of harm to the modern world.
You can't exactly state that one invention tops all others. We need Antibiotics for medicine, which increases health and life span. We need Music for entertainment. We need the internet for communication, advertising, and a multitude of other uses. We need aircraft for quick travel.