1. Greg Cox
Almost definitely a name even more obscure than Gary Seven, but bear with me. Considering Khan is such a fan favourite, it is surprising that he wasn't utilised more in the transmedia world Star Trek's tie-in fiction. Obviously the fact he is asleep for three hundred years has something to do with this, but it did result in a less-is-more effect that kept his character fresh and unspoiled. The best example of his other appearances is the trilogy of Khan books written by, yep, Greg Cox. Charting Khan's rise, fall, and exile, this three volume series is a great exploration of Khan in his natural environment, but given that Star Trek novels are a somewhat niche market, it hasn't been able to reach the full audience that would appreciate it. As a non-canonical story it's fair to assume that the events depicted in the novels would, at least to a certain degree, be contradicted. In fact the third novel which covers the events between Space Seed and The Wrath of Khan, To Reign In Hell, was itself virtually ignored by the release of the comic book mini-series Khan: Ruling In Hell which told an alternative version of the same story. More important than this however, Cox's novels show that not only is there a desire for more Khan, but that a number of points already made in this list are not just feasible, but in fact provide great drama and entertainment. Cox's novels are living proof that a Eugenics War TV series couldn't fail. When considering the fact that more and more TV series are being adapted from books anyway, who's to say the novels wouldn't be a great starting point in the first place...