Well now we (they) would have to define the qualities of what makes a good character: popularity, emotional range, character development, quotability, etc.....
Sheriff of Nottingham has one or two great quotes.
Hans Gruber was a pretty good villain
Snape had a menacing presence and eventually showed vulnerability
Could go on and on, the guy has a ton of good movies under his belt.
Make it a fight with movie resources though, be more fun.