Answer:
He is most likely suffering from Obsessive-Compulsive Personality Disorder
Explanation:
Obsessive–compulsive personality disorder is a type of personality disorder which is characterized by excessive uncontrolled worry or concern for perfection, rules or regulations, orderliness, interpersonal control, workaholism and miserliness. This personality disorder affects the efficiency, flexibilty, relationship and willingness to experience.
Therefore, he is most likely suffering from Obsessive-Compulsive Personality Disorder.