TCM is saluting Best Actor Winners tonight in its ongoing “31 Days of Oscar” TV fest, and the fun leads off with 1965’s Cat Ballou, for which Lee Marvin won the Best Actor Academy Award that year. Never mind that his performance, as a drunken former gunslinger, actually was a supporting rather than leading role – it was so good, he deserved to win. And this, to me, is the movie where Jane Fonda really proved she was a carry-the-film movie star in her own right – three years before she proved it, a different way, with Barbarella.  But with Cat Ballou, it’s a very clever story, some wonderful music, and one of the lightest and best comic Westerns of that decade, until Butch Cassidy and the Sundance Kid came along.