Passel Argente is the Koorivar Magistrate of the Corporate Alliance, one of the commercial leaders who pledge their forces to Count Dooku on Geonosis in Attack of the Clones (2002). He is among the Separatist Council members killed on Mustafar in Revenge of the Sith (2005).
He has almost no dialogue and that is close to the point: the Confederacy's founding scene is a boardroom, and Argente is there to make the boardroom look like more than three people.
Catalogue entry. This figure has a verified record here rather than a full write-up — the encyclopedia labels its own depth instead of padding it.