Ringleader (noun) — القائد الرئيسي أو مُحرك الجماعة: A person who leads others in wrongdoing or mischief. Below are 7 words with a similar meaning; the linked ones have full GL Dictionary entries with their meaning in Arabic.
A person who starts or provokes an action.
The person with highest authority in a group — the main leader; also 'most important' as an adjective
A person who plans and directs a complex scheme; as a verb, to plan and direct.
kingpinorganiserbossagitator