Here is my first suggestion:
"If you can pity me, Miss Dashwood, pity my situation as it was then. With my head and heart full of your sister, I was forced to play the happy lover to another woman!" (chapt.44)Although John's obvious punishment is that of his marriage to Miss Grey, I think what is the worse punishment is the emotional one - the fact that he once had possession of love and lost it. He knew what it was like to be loved and to love and because of his own vanity lost it all, and knowing that never again would he possess all that was dear to him, or ever feel that feeling again. It's tragic and I believe what redeems him as a character is that he shows remorse and blames himself entirely for what he has done.
"But I have done it. To avoid a comparative poverty, which her affection and her society would have deprived of all its horrors, I have, by raising myself to affluence, lost everything that could make it a blessing." (chapt. 44)
I will post more up for you to see during the week and once the list is big enough I will put it up into a poll and we can see who is generally acknowlegded as the villain/antagonist we sympathise with the most.
I would love to have your thoughts and suggestions on which villains/antagonists you sympathise with!