(written from a Production point of view)
Marcus Eley is an actor who appeared as the wedding oboe player in Star Trek Nemesis. As a background actor he received no credit for his performance and was identified by the name tag of his costume which was sold on the It's A Wrap! sale and auction on eBay. 
Among Eley's credits are the short films Everything Nice, Closing Statements, and Bag, the comedy Old School (2003, with Patrick Fischler, Harve Presnell, Terry O'Quinn, Ray Uhler, and Andy Dick), and the thriller Succubus: Hell Bent (2007, with Skip Stellrecht).
Eley also appeared in several television series, including Family Law, The Court, Do Over, The District, Presidio Med, Boomtown, My Wife and Kids, and The West Wing (2002).