As I've expressed in the past, I am not a fan of this term; why does someone else get to judge what is legitimate for you to be upset about? But I know this is a joke thread....so I'll play along.
I vote the N-doms of the NFs. More likely to read into things, IMO. My real life experience is that ENFPs get pouty easily, but then get over it relatively quickly; and INFJs blow up out of nowhere & hold some ridiculous grudge for years, often over something they've done themselves (can dish it out, but not take it). I consider that the most "butthurt"; they set the tone, after all....
INFPs get really, really quiet when hurt, and if it's noted, then people often don't know why & tend to assume it is something more frivolous than it really is (which may seem "butthurt" to them). If an INFP snaps back, there's a greater chance they think they are playing your game, not necessarily hurt (NTs aren't the only sardonic ones...). Sometimes people see hostility when it's just a passionate interest in a topic; NPs like to consider different perspectives indepth, and may even play devil's advocate with people.