It sounds like what you like is composition, through-composition. Nothing wrong with that. The most extreme version of the jazz you are not into as much would be free jazz, starting, say, at the beginning of the 60s. But there are many jazz composers who incorporate the shift to modal progressions (as opposed to standard blues progressions, pentatonic scales, etc) in the 1950s. Try the collaborations between Miles Davis and Gil Evans (Porgy and Bess; Sketches of Spain), Evans' Out of the Cool, Henry Mancini, Quincy Jones, Oliver Nelson (Blues and the Abstract Truth), or Lalo Schiffrin. I wouldn't turn my nose up at John Barry's early James Bond soundtracks either. Glad you are exploring Wes Montgomery. Although firmly in blues traditions, Jimmie Smith is a genius improviser/composer, and his collaborations with Wes are amazing. In my opinion, exploring that golden age of the late 50s, early 60s, on the cusp of the turn to free jazz and fusion, will provide some great entry points. Then you can stretch from there into the records of Miles Davis' second group: ESP, Sorcerer, Miles Smiles, etc. and on from there. Enjoy! ps - Jeff Parker is a genius. Check out Isotope 217's _The Unstable Molecule_ from the 1990s.