Nephthys
The Gr8est!!!!!!!!
Yeah, but the Dark Side Agent is little more than a thug who does the Sith's dirty work despite a lot of the story saying "the Sith are insane megalomaniacs with superpowers in charge of everything and that sucks." The Neutral path is generally the most practical, sane and professional one most suited to the Agent and allows for ruthlessness and restraint in equal measure without the suicidal heroics of an exclusively Light path or general evil of the Dark path. It's also the only one where you remain an Imperial Agent at the end.
I mean, the Dark path definitely can't be canon since it has Jadus taking over the Empire which is ludicrous.