chief

Definition

The term "chief" refers to the most powerful or most important leader of a particular group.

Some examples of this include, "chief musician," "chief priest," "chief tax collector," and "chief ruler."
It can also be used for the head of a specific family, as in Genesis 36 where individuals are named who served as "chiefs" of their families.
When used to describe a noun, this term could be translated as "leading" or "ruling," as in "leading musicians" or "ruling priests."