In order of appearance:
The Renegades: The Meddling Monk, The War Lord*, The Master, K'anpo Rimpoche, Drax, Romana II, Salyavin/Prof. Chronotis, The Rani
The non-Renegades: The Timelord from "Terror of the Autons" that warns the Doctor of the Master's arrival, Romana I**
The Baddies/Legends...