I would think something more along the lines of Stitches or Helcular. Still, I agree, no thanks, it would either be too disruptive like Helcular was pre nerf, or too pointless like Helcular was post nerf.
Stitches was good though, since whenever he spawned he would walk down the long main road, you could avoid him completely (or not see him and get destroyed), when he got to town he'd die pretty quickly, and if you killed him you got a neat trophy for your efforts.
That might be ok. Just a couple of elites that have long set paths. Like Son of Arugal, Mor'Ladim, Devilsaurs and Fel Reavers.