Monk, Mingus, Wayne, and Pat Metheny. You know a Metheny melody right off, the phrasing, and the kind of chords.... he has a distinct harmonic sense in his tunes. Now, one could argue that you can't tell whether Lyle Mays or Pat wrote the melody lines of some of their greatest tunes, but Pat is more concerned with singable melody, and Lyle's melodies to me have more of a sense of a "process" to them, if you know what I mean.