"excellent representative" is correct and usable in written English.
You can use it to describe someone or something that is performing its job or task in an outstanding way. For example, "John is an excellent representative for the company; he always does his best to ensure customer satisfaction."
MacMillan Cancer Support's recent Good Day campaign is an excellent representative of this, because instead of objectifying us as tragic victims it accurately represents – in a few simple words and images – the emotional burden of living with cancer rather than dying from it.
-"He's an excellent representative of the whole shift around here.
"She is going to be an excellent representative for us and the United States.
I am confident that he will be an excellent representative and will remain a close friend.
"Starting a business in Australia is evidence of an entrepreneurial spirit, succeeding at it, is evidence of entrepreneurial skill … Jason [Falinski] would be an excellent representative in the federal parliament," Baird said.
"Adam and the Pirates medical team have done everything possible to get him back to match fitness and during his time here he has proved himself to be an excellent representative of the club.
We all found common ground in our love for sangiovese, and thought our favorites were excellent representatives of the grape.
Two excellent representatives of Ljubljana's impressive art and design scene are Galerija Equrna (Gregorciceva 3a 386-1-252-7123; equrna.si), a pioneering private gallery of avant-garde art dating back to the former Yugoslavia, and Tanja Pak Design (Precna 6; 386-1-431-5246; tanjapak.com), where Ms Pak, the artist-designer, showcases her award-winning glass creations.
Regent's tours run like clockwork though and the guides I met were all friendly, knowledgeable and excellent representatives of their respective countries.
TraA, TraG, and TrbE are large multidomain proteins making them excellent representatives of the transfer system.
This was an excellent example of one of our Representatives taking great care to investigate a potential issue, and pivoting when the user revealed it was a joke".
