To be fair, average height depends a lot on the time-period one is from and where one comes from, mostly due to genetic tendencies from various areas but also due to native environmental factors. In modern Earth an average height of around 1.6 meters is indeed very rare to find in any area (though there exists countries where the average height is even shorter than that; Estonia, according to the statistics I can find, actually has a rather high average height), but no further back in time than the early eighteenth century the average height in large parts of Europe was actually not that far from 1.6 meters.
I'm sure you knew most of this, if not all of it, but considering that Maldron seems like he's probably from medieval times, it's feasible that he could be average height where and when he came from. It would make an interesting contrast, though, to view Maldron next to the 1.87 m Perfect; as if Perfect needed even more confidence.