If we're talking "cool" then there can't really be any doubt, can there? Who's cooler than the Mouser? I mean, Gandalf may be wiser and Conan might be tougher, and Elric's got the gloomy whining vote all wrapped up, but the question was "Who is the coolest", was it not?
And NOBODY is cooler than the Grey Mouser.
Well, okay, Christopher Walken is cooler. But he wasn't on the list.