Honour as a concept can have a few different opposites. It also has slightly differing definitions depending on context, and you blew through a few of them in your post. I think it's difficult to label all of honour's opposites with one word/concept. One interpretation of honour in excess, from the perspective of reputation and meriting respect due to the content of their character, could be Vanity.
1 : inflated pride in oneself or one's appearance : conceit
2 : something that is vain, empty, or valueless
Vain: having or showing undue or excessive pride in one's appearance or achievements
So if vain is what describes a person who overly pursues a good reputation, vanity is the base concept of that description. One can of course achieve a good reputation by being chivalrous, fair, respectful, etc... I think that this does not fit if one is talking about honour in terms of integrity, as the opposite of that is not vanity but dishonesty. Therefore a person with integrity in excess would be rude or discourteous.