Question: who played sirius black in the harry potter series
Answer: Oldman went on to star as the antagonist of films such as True Romance ( 1993 ) , The Fifth Element ( 1997 ) , Air Force One ( 1997 ) , and The Contender ( 2000 ) , for which he garnered a Screen Actors Guild Award nomination ; corrupt DEA agent Norman Stansfield , whom Oldman portrayed in Léon : The Professional ( 1994 ) , has been ranked as one of cinema 's greatest villains .