the person in charge or the leader

someone with authority or influence in a particular area

मुख्यमंत्री

English Usage: She is the head honcho of the marketing department.

Hindi Usage: वह विपणन विभाग की प्रमुख है।

an important or influential figure

महत्वपूर्ण व्यक्ति

English Usage: The head honcho made the final decision on the new policy.

Hindi Usage: मुख्य व्यक्ति ने नई नीति पर अंतिम निर्णय लिया।