First a quick rundown of how this all works for those who are new.
I take all the films an actor or actress has been in and break them down into three categories, 'Good' 'Bad' and 'Ok.' I do not count TV appearances or Made for TV movies. Afterwards a quick analysis will show whether or not they're a good actor by the numbers. Invariably there is a 2-3 +/- point bias on a person to person basis. Also, since 'ok' movies are not bad they count towards the positive column in the overall figuring. If, by the numbers, they fall in the 50 - 60% range, they're a bad actor; 61 - 70% good actor, and 71 - 80% great actor. Anything higher is unlikely, but will be classified as "elite."
But enough talk. Let's find out if we're justified in liking ice cream:
Quite frequently with comedians you run into a low percentage of good movies. Just because you're funny doesn't mean you can act. In the case of Bill Murray, he's always had that added depth he could bring to a performance. As he's gotten older he's shown his incredible flexibility with roles, taking parts that are different from things he's done before. He's also one that doesn't just take any role, which means fewer mistakes. As it stands, with 70% positive over 30% negative, Bill Murray is officially a good actor. Another couple of good films and he'll move up into the greats.