As far as issued recordings go, my namesake (Clifford Thornton), Alan Shorter, Bill Dixon, Kees Hazevoet, and Ric Colbeck, and almost complete on Frank Wright (just a couple of Penck CDs I need to get). Fairly close on Burton Greene, Charles Gayle and Glenn Spearman. I think I have several holes with Sunny Murray to plug but I'll get to them eventually. Ayler is nearly done although I think I'm missing a couple of bootlegs. Lacy has a few LP holes but the CD era is a bit less "complete" (this is an issue w/ Cecil as well -- all the LPs, but later CDs not nearly enough). Thankfully and hopefully there's time to do this -- I never think of it as a particular project, but something that just happens over time.