Specifically, this is aimed at those who read the books and created a mental image of the characters as you read along. Obviously the films weren't going to perfectly reflect one's own imagination, so let's keep this limited to the Fellowship of the Ring (as in the actual fellowship, not the film).

Which of the nine walkers ended up being the most accurate to how you imagined, and who was least accurate? I'm mainly curious about the physical appearances rather than personality, because the latter is more due to the screenwriters' interpretation rather than visual aspects.