Such a freak (just kidding) has been identified, actually: Chart Three-A
My first thought is they were either mistyped or must be a very conflicted creature. However, mightn't a certain kind of 'strong, silent type' of person be an INFP Eight? A bit like Martin the Warrior from the Redwall series (for anyone with that as a reference...) Not that I think he was one, just that there might be ways to manifest a desire for power more conducive to the INFP cognitive preferences.
There are some other results that aren't quite stereotypical as well, INTJ Fours for example, and an ESTP One, but I don't think they're unbelievable.