Most of the time, even in jazz that sounds techincal, the music is about everything but techincal perfection, IMO.
Yngwie malmsteen is more about technical perfection than, say, John Coltrane. I WOULD throw Allan Holdsworth under the technical perfection light, but he, too, also has some very deep, thoughtful melodies and songs.
The Yellowjackets are more of the breed of modern pop/jazz. I would associate the term "Modern Jazz" with the likes of Brad Meldhau and Jason Moran. But jazz is changing every day. There are many who would call anything Post-Charlie Parker as modern jazz. The stuff that was modern yesterday (like Joshua Redman and Mulgrew Miller) isn't really what we're hearing today from Kurt Rosenwinkel.
It's very deep and complex -______-
For me, elevator music is more along the lines of Marcus miller and some of George bensons smooth jazz escapades. Also, a lot of the Pat Metheny Group (w/ lyle mays) sound elevator-y to me.
For modern jazz that isn't lifeless and mundane.... check out these guys:
Kurt Rosenwinkel - "Heartcore" , "The next Step"
Avishai Cohen - "Lyla"
The RH Factor - "Hardgroove" , "Distractions"
Gary Thomas - "Til We have Faces"