Three types of Jedi
Light: Fully light side users who are like Yoda, Obi-Wan Kenobi and all those guys/girls. Light Jedi only use weak force powers that are for the light such as mind tricks, telekinesis (force waves/pushes and throws/repulsions), and non-aggressive uses of the force.
Dark Jedi: These guys/girls are not quite Jedi and not quite Sith, but are on the dark side of the force.
There are two Dark Jedi:
Jedi version: They seek to make the Jedi Order a Dark Jedi Order but hide within the order, pretending to be benevolent Jedi when they are Dark Jedi with hateful feelings of the Sith but are not true Sith themselves.
Sith Version: They are on the Dark Side and a Sith Lord but consider themselves Jedi, with the moral codes and things the Jedi have but for the sith.
Gray Jedi are truly neutral- not one side or the other.
Then there's Light Sith: Sith who follow the ways of the light (basically a good guy Sith).
But there should be Gray Sith too to balance it out, like the Gray jedi. The Gray Sith doesn't work for a specific side either, but is a Sith instead of Jedi. There should Jensaari class too. And also a Jith class Jedi/Sith, like Jensaari but are true Jedi mixed with Sith, not just force users alone. So a difference between Jensaari and Jith or Sithi- Jith is the Jedi one and Sithi is the Sith one.