I may be affiliative? (doesn't know exactly what this means)...
I don't see why ISFP isn't an option.
I think ISFPs are more "pragmatic" than "affiliative".
Accept the past. Live for the present. Look forward to the future. Robot Fusion
"As our island of knowledge grows, so does the shore of our ignorance." John Wheeler
"[A] scientist looking at nonscientific problems is just as dumb as the next guy." Richard Feynman
"[P]etabytes of  data is not the same thing as understanding emergent mechanisms and structures." Jim Crutchfield
Healthy side of this wing brings a withdrawn, complex creativity. May be somewhat intellectual but have exceptional depth of feeling and insight. Very much their own person; original and idiosyncratic. Have a spiritual and aesthetic openness. Will find multiple levels of meaning to most events. May have a strong need and ability to pour themselves into artistic creations. Loners; can seem enigmatic and hard to read. Externally reserved and internally resonant. When they open up it can be sudden and total. When entranced or defensive, Fours with a 5 wing can easily feel alienated and depressed. Many have a sense of not belonging, of being from another planet. Can get lost in their own process, drown in their own ocean. Whiny - tend to ruminate and relive past experience. Prone to the emotion of shame. Air of sullen, withdrawn disappointment. May live within a private mythology of pain and loss. Can get deeply morbid and fall in love with death.
Oh, wait, no, you're right.
-Carefully taking sips from the Fire Hose of Knowledge