Welcome to SoM. I am not sure what you mean by elemental magic, this term is used incorrectly at times.
There are four 'base' elements that we generally refer to here. Earth, Air, Fire, Water. depending on what path you follow there are more than those, I believe the Japanese system has 5 or 7.
We are made up of all of the elements. There is no 'one' that is best. That belief stems from western astrology in which each sun sign has an element attribution. There is no need to limit yourself to just that one.