Isn't Teo really responsible for "It's About That Times" as Miles played it in concerts? Listening to the original studio version on the In A Silent Way box set it appears that what Miles might have originally thought of as the theme sounds a bit like Chuck Mangione. Teo completely jettisoned that part and pulled out what we now think of as the theme from one of Miles's solos.
BTW George Avakian also created a lot of classic cuts using scissors, though nothing quite as creative as Teo.