May I suggest, for Part 4, Paul Chambers behind Miles Davis, John Coltrane, Wynton Kelly and Jimmy Cobb on So What." Like Heath and LaFaro in their various ways, where Chambers puts one" is a place where no one who's playing with him literally is, but it's a place that all can touch and play off of. I think that's a fairly basic (no play on words intended) general principle.
Good suggestion. The performance is from a 1959 episode of The Robert Herridge Theater on CBS-TV. Herridge introduces the program and the piece. Gil Evans leads the orchestra, whose function in this clip is to set the mood for So What."