They were pretty much released all at the same time in the US too (around 2007). As for official, both Sweeping Up the Spotlight and Live at the Fillmore East were released by BMG/RCA, the Airplane's official record company, and I believe Bill Thompson himself assembled the material on Sweeping Up the Spotlight. According to Jorma's Fur Peace Ranch store, which I assume is approved by him, the Charly ones were authorized by the band as well (At the Family Dog Ballroom, At Golden Gate Park, Last Flight).
Skip Flight Box (it's just Last Flight & At the Family Dog in a box-set) and Feed Your Head (it justs rips off tracks from the studio albums and Bless Its Pointed Little Head). However, "Cleared for Takeoff" might be interesting - it has recordings from the Fillmore in March 1967. The sound quality varies a lot though, and I'm pretty sure that one is not official. I like the Golden Gate Park one, just beware of the "We Can Be Together" track where there's a bit of a sound problem. Also the last track isn't "Mexico" as labeled on the case, it's actually "3/5 of a Mile in 10 Seconds." I loved At the Family Dog Ballroom and I think Last Flight is a good listen for the live versions of "Blind John", "Walking the Tou Tou", and "Papa John's Down Home Blues" among some good performances of "Have You Seen the Saucers" and "Feel So Good." A lot of the live material on that one is from Bark and Long John Silver.