Maybe turning things upside down is the way to go when it comes to typing by reinin dichotomies.
Emotivist = a person that is not an Fj, nor is s/he an Tp.
So it would be something like: a person than doesn't act upon his-her "ethics" naturally nor is s/he especially nitpicky about technicalities.
Constructivist = a person isn't Tj, nor is s/he an Fp.
Wooohooo!!!