Grand Wizard was the title given to the head of the Reconstruction-era Ku Klux Klan which existed from 1865 to 1869
In 1915, the Knights of the Ku Klux Klan were created along the lines of a fraternal organization. The highest-ranking leader of the latter organization was the Imperial Wizard. National officers were styled "Imperial" officers. State or "Realm" officers were styled "Grand" officers. A "Grand Dragon", for example, was the highest-ranking Klansman in a given state.
Following World War II, dozens of people have assumed the "Wizard" title as leaders of the numerous, independent, Klan-oriented organizations that have existed since then, the majority of which lack historical significance.
Grand Wizard Wikipedia
This list excludes those of post-war, independent factions.Nathan Bedford Forrest, Grand Wizard, Reconstruction Klan, 1867–1869
William Joseph Simmons, Imperial Wizard, second Klan, 1915–1922
Hiram Wesley Evans, Imperial Wizard, first Klan, 1922–1939
James A. Colescott, Imperial Wizard, second Klan, 1939–1944