Halloween Costume Help?

Well I will be out of town for Halloween and I was planning on being John Dillinger, or just a mobster in general so I brought along with me a black dress shirt, black vest, red tie and a fedora however I forgot my black pants but I do in fact have jeans. However, is there another character that I could be with the same costume just without the jeans..worst case scenario I will just go as a mobster wearing the formal upperwear with jeans.