What are the 4 main tributaries in the Chesapeake bay?

The James River, the Rappahannock River, the Potomac River, and the Susquehanna River. But since the Chesapeake Bay is basically the estuary of the Susquehanna River, one could say the Susquehanna is not technically a tributary. In that case, the next largest river emptying into the Chesapeake Bay would be the York River.