@jmalen123 , I meant enigmatic not that in the sense of what they play but how they are as musicians. Zappa's improvisations are enjoyable indeed, I think Back is a more popular standard player.
@stuartk , I consider Luca's solos superior as they "touch" my soul deeper (subjectively). The other guitar players I mentioned in my post are more "analytic" (one may not agree that John Mclaughlin is analytic, but still (except his Mahavishnu years) he relies on traditional roots. Miles created something completely new.
If Lucas, as a guitar player was not that outstanding, was Miles playing on the guitar with Lucas hands? I wonder how Jimi Page or Hendrix would play these sessions instead of Lucas (perhaps, not better). The mystery comes from Miles. For me, he is the best (jazz) musician. I would not like to say that traditional jazz is superficial, but the music created by Miles in his electric years, to me, is still deeper. It is not just the music, something wider. I hate when Miles Davis is compared with Coltrain, they existed in different dimensions. Coltrain is nice, sometimes spiritual, Davis is enormously wide and enigmatic. He created music during more than 40 years and also generations of outstanding musicians! Bill Evans lasted for less than 15 years, Jimi Hendrix was so creative but for only 2-3 years! Unfortunately, these guys, Keith Emerson, Greg Lake and many others are not alive. Thank God, Jimi Page, Robert Plant and others still motivate us with their existence (at least)...