A 32-year-old man presents to the psychiatry clinic with his wife, who complains that he is excessively preoccupied with orderliness, perfectionism, and control. He spends 3–4 hours daily organizing his work files and becomes distressed if anything is out of place. He has difficulty delegating tasks at work because he believes no one can do them "correctly." He is rigid in his moral beliefs, reluctant to spend money even on necessities, and has few close relationships. His wife reports he is emotionally distant and rarely expresses affection. He denies any magical thinking, paranoia, or social anxiety. Mental status examination shows organized thought process, intact cognition, and euthymic mood. What is the most likely personality disorder diagnosis?