Well, I'm not a huge fan of the band, but Meshuggah may fit the bill. Check out Destroy Erase Improve, it's probably their best, esp. in terms of the jazzy elements.
Some of the noise/mathcore stuff might be up your alley too. Stuff like Dillinger Escape Plan, Luddite Clone, Burnt By The Sun, Watchmaker, etc.
Also check out Cephalic Carnage, they do some interesting stuff with jazz timing signatures and go out on some pretty messed up tangents within a general deathgrind framework. Interesting stuff.
On the new Origin album, Informis..., the drummer is also making use of a lot of different percussion styles, including jazz. In fact, a lot of the tech death metal may be up your alley. Stuff like Atheist, Theory In Practice, Gorguts, etc. Lots of crazy tempo changes, very complex music, that carries forth that jazz spirit of almost being meta-musical, if you catch my drift.
You may also want to check out Fantomas' first album. I don't remember what it's called or if it's eponymous....it's a little hard to listen to, for me at least - a little too out there avant garde for my tastes...but it may also appeal to you.
Hope this is of some use to you....
j/k
