I'm gonna have to agree with the general consensus here. I'm changing my guess for Mulder to INFP.
Teacher (Idyllic), ESE-IEI (Si-ESFj), SLue|I|, Sanguine-Melancholy
Sage, True Neutral (Chaotic Good), Type III Anti-Hero
Inventive > Artistic > Leisurely > Dramatic
7w6 > 4w3 > 9w8, weakside sp/so
Dark Worker (Sacrificing)
I've just started on an adventure to watch all 9 seasons ... I'm thinking Scully is an ISTJ and Mulder an INFP. I feel like they're in a constant SJ/NP battle
In my defense, I am a terrible person.