As long as war is waged on Azeroth, there will be men and women who fight those wars. The warrior is no mere sword-swinger; they are skilled combatants, combining strength of arm, knowledge of weaponry and practiced maneuvers to slice or bludgeon their foes into little red bits. The warrior is the most versatile of the combat classes, and they supplement their fighting prowess with the ability to rally their allies and spur them to victory, but not only can they rally their allies into victory; they can themselves charge into the heart of the battle, take several lives and live to tell the tale. All races fight, and all races boast many warriors in their ranks. Warriors are common among dwarves, Forsaken, humans, and orcs, but are less so among the other races. Masters of swords, spears, and weapons of all kinds, warriors share a common way of life on Azeroth. Using their abilities to deal pain and cause bloodshed, warriors are deadly adversaries and welcome friends in violent times (which seem to be all the time in recent decades). Warriors have existed in every race, from the murlocs to the tauren. Anyone willing to take up arms to defend their people can be classed as a warrior. A knight is the warrior elite among humans.
Here is a list of Warrior.