You're going to get a bunch of advice probably, but I suggest that you approach this chronologically. Start with the missing EmArcy stuff, which has been reissued primarily by Spanish label Fresh Sounds (and a few others), move through the Birdland Dream Band CDs, and then move into the available Roulette, Cameo, Atlantic/Enterprise, and Mainstream things mentioned by others here. Then, for heaven's sake complete your early Columbia releases (see Wounded Bird) and the many odd independent and one-off recordings of the eighties and nineties to include the Concord things. Do not discount the Dianne Schuur release. If ever there was a vocalist born to compete with and compliment MF's style, it was Schuur, in my opinion. The few recordings from the 21st century are already suggested, I believe, though I do not see M.F. Horn VI on anyone's list. UpperRegister is correct. You are missing a lot, but they're out there if you look for them. Good luck.