Break it down into the eras, starting from the origins, we have the likes of: Muur, XoXaan, Ragnos, Sadow, Pall, Ductavis
Then around 4000 BBY you have the likes of Revan, Nihilus, Treya, Exar Kun, Zym, Satele Shan, Sunrider
Then around 1000 BBY you have Bane, Zannah, Coven.
Then around 0 BBY / 1 ABY you have probably Starkiller..
After that, Caedus.
Of course this is my opinion and I may have missed people out