Kamuela (at least I recall that they were both Kubilak and Krunk, but I may be mistaken) is pretty much the only guy who's "tapped orc potential", if that is going to mean anything, though Quas did a good one at some point.

Orcs in general have never been very deathly, are played by few people and an even smaller fraction who do them well.

And in that respect: not even close.