Organizations vary greatly on what they use to chart their team. More fluid organizations don't want to have it written or documented at all, since they tend to be smaller models where individuals have their hands in multiple job responsibilities and tasks.
Other, typically larger organizations, such as matrix based companies love their large organizational charts. These charts are typically the pyramid style, with the CEO at the top and contributors at the bottom descending in responsiblity level.
Finding the right organization chart for your company depends on a variety of factors, however you NEED to have some type of structure. At ETP we use an upside down pyramid. In our model, the CEO is at the bottom and then team members extend up form there, level by level.
In this upside-down pyramid, the focus is to show support. The CEO and especially the C-Suite are there from a servent-leadership style. We prefer servant-leadership in the scope of our business at ETP, but also for our clients in their project management needs.
To explain servant-leadership a bit more, it's about being a servant or at service to your team. You are there to assist and provide direction when needed for your team to do their jobs well.
C-Suite, CEO, CFO, etc. are at the bottom of the pyramid supporting the organization at the top. Those doing the day-to-day work are listed at the highest section of the pyramid, so you are illustrating the servant-leadership model.
The reason the organization chart is so important and should be framed proudly on your office wall is becasue you want to show your team that you as a leader are there to help support them and provide a framework for the work being done. This is especially true in a servant-leadership based organization.