how about a 100/100m drop bar fully?

[bruto]

http://m.dengfubikes.com/index.php?s=/229.html

also fits a 800mm travel dropper post (if you're tall enough)

[carbonazza]

Why not put a handlebar on any of the cross country bike we've seen here ?
There is more choice 

One thing I learned the hard way, is that the derailleur cable on a road/gravel bike exit at the very end of the chainstay/seatstay, after the axle.
While on an MTB, it exits from the right chainstay before the axle.
If you want to put a cable actuated Eagle derailleur for instance, you'll need some 3D printing or other hackerish solution.

[Schumo]

That posting on their website is more than a year old - I wonder if they ever bring that frame.