List of Famous ISTJs - they are clear-sighted, logical, and efficient. They are planners rather than spontaneous, and prefer order and routine in their work and home lives. These celebrities fit the bill.
This is the first time I've taken the full Myers-Briggs test, it's kind of interesting what I "am." Chances are, your personality is similar to one of the sixteen types defined by Carl Jung and Isabel Briggs Myers.