De Gea Djemba-Djemba Valencia Evra Cantona Saha Sylvan Ebanks-Blake immediately spring to mind. EDIT: John O'Shea of course.
Hurrah, that's the last of the obvious ones I think Yeh, he was the one I'd never heard of. Only played a handful of games apparently Indeed. Wasn't aware he ever played for us, and on looking it up saw he made 1 appearance. Think that's everyone named in the thread. Full list: De Gea Paul Rachubka Patrice Evra John O'Shea Eric Djemba Djemba Paul Pogba Antonio Valencia Jules Maiorana Shinji Kagawa Federico Macheda Luis Saha Eric "The King" Cantona Sylvan Ebanks-Blaka