Darkplace is good first time round, doesn't have much replay value though. The "One Track Lover" song (from episode 5 i think, the broccoli one) is the best thing of the whole series, i still find myself singing it to myself on occasion
Nighty Night is absolute class, can be almost too dark in places but Mark Gatiss character (glen bulb) is fantastic, he is a genius. Episode 1 of series 2 is my fave btw (do you know how to stroke a horse?)
Spaced is legendary, from start to finish it is excellent, cant believe i'd never even heard of it till it was long off the air. better than the office imo
not seen the others you've mentioned but would be interested to know if they're any good, i'm looking for something to fill my comedy hole so to speak