Who was the head of the Zulus at the time of the Mfecane war?

Explanation

The three powerful states that became involved in the Mfecane at the initial stages were the Ndwandwe led by Zwide, the Mthethwa led by Dingiswayo and the Ngwane led by Sobhuza and their expansionist ideas were ultimately crashed by Shaka(king of Zulu)