One who doesn't want to be replaced, especially in companies with a few very large shareholders who have their representatives on the board (e.g. major investor

One who doesn't want to be replaced, especially in companies with a few very large shareholders who have their representatives on the board (e.g. major investors in startups) where if a CEO isn't proactive in ensuring that their vision is aligned with the board's vision will not be a CEO for long, even if they were the founder or something. "Managing the board" is one of the major jobs of the CEO, most of that work done outside those key moments when the board meets to formally vote on what they usually already decided based on earlier discussions between themselves, CEO, shareholders and others.