The phrase "primary representative" is correct and usable in written English.
You can use it when referring to someone who is representing a group, such as an elected official or a leader. For example: "The primary representative of the student council is responsible for attending all meetings."
Igor Volkov, the Russian broker, became the clients' primary representative.
They call out the plays, and often appear as the primary representative during press conferences.
This house should continue to have the primary representative mandate from our constituents.
In the Republican primary, Representative Wayne T. Gilchrest lost to a more conservative opponent, State Senator Andy Harris, setting up a general election without an incumbent.
When redistricting pitted him against the more liberal Representative Lynn Rivers in a 2002 primary, Representative Nancy Pelosi of California sent $10,000 to Ms. Rivers.
Several attendees said that Nocsae's primary representative at the meeting, Dave Halstead, told them that the organization would pursue a different standard for children.
As the result of his work on that issue, the referees hired his firm as their primary representatives a few months later.
The behaviors of livestock on farms are the primary representatives of animal welfare, health conditions and social interactions.
Ignacio was one of the primary representatives of the Gates Foundation at this global trade show with over 49,000 participants.
He selected two men as his primary representatives: James D. Bulloch and Lieutenant James H. North of the Confederate States Navy.
Following the September 1832 treaty with the Ho-Chunks, Scott and Reynolds conducted another with the Sauks and Meskwakis, with Keokuk and Wapello serving as the primary representatives of their tribes.
