Doctor Who Matrix
Neil E. Hobbs (light and sound designer / collaborator for The Penny Dreadfuls, and general theatre wunderkind) has produced a beautiful and highly useful chart of relationships between Doctors, Companions and adversaries in the universe of Doctor Who. It is also, above all, a huge chart, and in that respect alone will fulfill most of your chart needs for the coming year.
I urge you to run over there to admire it in its full glory, and to nit-pick details.