Los Angeles, Aug 5 (IANS) One of the most versatile actors, the four-time Academy Award nominee Willem Dafoe has opened up on his portrayal of a billionaire. He might not seem like the obvious choice to portray a swaggering, playboy billionaire modeled on Greek shipping magnate Aristotle Onassis, and he also wasn’t too sure about playing the character, reports ‘Variety’.He said, “Me? Playing a Greek shipping tycoon? I don’t think so”.He is perhaps selling himself short. But for his l…