Let's see...On my bookshelf sits Darkside Blues, a movie that, for some reason, despite no one but me ever having heard of it, got reprinted recently, though I have an old copy from a video store going out of business. ANN has under 250 reviews, so I'ma call it fairly obscure. There's Narutaru on my computer, a show where young kids meet cute dragon sidekicks, and also end up fighting to the death against a bizzare, creepy conspiracy. Also the cute sidekicks may or may not constantly hunger for blood. 388 reviews on ANN. I've got Masters of Epic on my computer, a short variety anime based on a Korean MMO. That's gotta be up there, at only 12 reviews. I've got Neo Tokyo, which is basically like Memories only by different creative talents, with 163 reviews. I also own Reign the Conqueror, at 599 reviews, although I'm not sure how obscure you could call anything by Peter Chung.(Just for comparisons on the standards of my measuring system: Anime News Network lists 7984 reviews of Cowboy Bebop, 5981 of Bleach, 7035 of Death Note, 9215 for Full Metal Alchemist. Probably could have found a better site/ more accurate measurement system, but eh.)
Sort of on-topic: I ran a college anime club. Go ahead and call me king dork.