At the beginning of the year (seems like such a long time ago...), Rotten Tomatoes ran a list of 100 Greatest Movie Characters of the Decade. Go take a look.
I reckon time's going to tell on Colonel Hans Landa (who should've been higher up), on Juno (who should've been lower down), and on Edward Cullen (who, unfortunately, is going to be one of the great characters of this decade). But any list that includes Ron Burgundy is good enough for me.