The guest on this week's nationally syndicated Motley Fool Money radio show is corporate-governance expert Nell Minow. In advance of the Academy Awards, Nell casts her votes for Best CEO, Worst CEO, and Unsung CEO. In this audio segment she cites, among others, News Corp.'s Rupert Murdoch for his role in the phone-hacking scandal, Starbucks CEO Howard Schultz for promoting job growth in America, as well as Berkshire Hathaway's Warren Buffett.