This is a deep practice and a part of training in insight as well as in character. Our enduring conflicts are often with those who are good but imperfect in ways particularly tempting or distressing to us. Such conflicts take on their own life after a while and give us a mission and a sort of identity. I have had my own share of quarrels in Zen. The only way I have found to heal old wounds is when hoping for nothing I release the other person from my animus against them and, incidentally, from my opinions about them.
Forgiveness is hard but has actual consequences and a magical power of blessing.
I have not seen it come about by lobbying. Whatever decisions you come up with, as a board, it is of the utmost necessity that your hearts are in it. So, right now any change from the current situation would mean, not just a grudging agreement, but a heartfelt willingness to have a new situation. And do not be afraid of waiting if this means doing it right. If the foundation is good the rest of the building is easy.