I don’t want to argue semantics. But a very minor point here is Monk.
They embody both sides of Chi, Light and Dark.
Light is the Element of Spirit, and Dark is actually Decay. This is where abilities like Touch of Death come from.
Minor point. But it’s there. There are 2 classes that draw on opposing forces.
Monk is Life and Death
Priest is Light and Void.
The WoW universe seems to be inherently self balancing in the way that it functions.
Postive forces must breathe negative forces into existance.
Shadow was spawned in the absence of the Light.
Disorder was literally spawned from a corrupted titan. A creature of Order and Logic.
And Life begets Death, as simple as ever.
The wow universe is cool as frick.