Employee and manager IDs from your HR system, photos as Base64, department for colour. Put it next to a table of people: click a manager and the table shows their whole team.
Team size set to Direct / whole team and an annual cost measure in Value: each card shows how many people a manager leads and the tooltip adds up the cost of their team. Line labels show the size of each branch.
Add a row for each open position with an empty name: vacancies appear as dashed cards in the place they will fill.
Project or country managers in Dotted-line manager ID: the second reporting line is drawn as a dashed curve over the main hierarchy.
A chart of accounts, cost centres, legal entities or a product tree: any table with an ID and the ID of its parent.