This is also my present view on loops, until I see sufficient evidence and/or reasoning to the contrary, and your outline seems to connect fairly well with what Celebrity Types believes:
About INTPs
•Abstract-minded systems analysts
•Amongst the types with the highest average IQ
•Strongly linked to the Schizotypal personality
•Somewhat linked to the Schizoid personality
•More common amongst men than amongst women
•Repress their Extroverted Feeling function, meaning that they may have difficulty emoting and figuring out what others need from them emotionally
About INFPs
•Idiosyncratic dreamers with strong imaginations
•Strongly linked to the Avoidant personality
•Somewhat linked to the Dependent, Histrionic and Negativistic personalities
•More common in women than in men
•Repress their Extroverted Thinking function, meaning they sometimes preserve their own opinion in the face of facts and evidence to the contrary
About INTJs
•Tenacious visionaries, oriented towards action
•Amongst the types with the highest average IQ
•Strongly linked to the Narcissistic personality
•Somewhat linked to the Schizotypal personality
•More common in men than in women
•Repress their Extroverted Sensing function, which means they may lose touch with factual realities and fail to adapt their opinions accordingly
About ISTJs
•Thorough and responsible administrators
•Strongly linked to the Compulsive personality
•Somewhat linked to the Schizoid personality
•More common in men than in women
•Repress their Extroverted Intuition function, meaning they sometimes resist change and view ingenuity with skepticism
And, just because they were mentioned so much, I'm also including INFJ and ISTP:
About INFJs
•Holistic visionaries, oriented towards contemplation
•Amongst the types with the highest average IQ
•Strongly linked to the Dependent personality
•Somewhat linked to the Depressive and Narcissistic personalities
•More common in women than in men
•Repress their Extroverted Sensing function, meaning they may forgo living life to its fullest
About ISTPs
•Cool, self-contained problem-solvers
•Strongly linked to the Negativistic personality
•Somewhat linked to the Antisocial personality
•More common in men than in women
•Repress their Extroverted Feeling function, meaning they may find themselves unintentionally giving offense
http://www.celebritytypes.com/