Prior to becoming one of the more unlikely leading men in Hollywood, actor Paul Giamatti made a career out of playing comic foils and repressed loners constantly on the verge of exploding with rage. Giamatti first grabbed the public’s attention with his vitriolic performance as Kenny – a.k.a. Pig Vomit – Howard Stern’s nemesis in “Private Parts” (1997), before quickly developing into the go-to guy for a director looking for an everyman-type actor who could convincingly project simmering intensity. His sour yet endearing performance as bitter comic book writer Harvey Pekar in the offbeat