In Lenore Thomson's theory, the four-letter code "INFP" stands for a person with:
Introverted Feeling as their Dominant Function
Extraverted Intuition as their Secondary Function
Introverted Sensation as their Tertiary Function
Extraverted Thinking as their Inferior Function
Bearing in mind the Classification Mismatches, here are:
Joe Butt's INFP profile
David Keirsey's INFP profile
Brenda Muller's INFP profile
Hirsch and Kummerow's INFP profile
Hale's INFP profile