The last option you are describing is a CEO. The employee who among the officers, charged by the board to execute their decisions, is chief among them. That's what makes them a CEO. Their mandate, authority and wages are decided by the board. And in the companies where the workers have a controlling majority, the CEO is unlikely to have either absolute majority nor an disproportional wage.

You have described how a workplace owned and managed by the workers can be compatible with the role of a chief executive officer.