Topman power will make you appear higher on the visitors list of those who have the same rank as you unless they also have topman, purple, or are married/BFF with a person of a higher rank. You will still appear lower than the "friends" of other users of the same rank as you. Users will always see themselves at the top.
If someone of the same rank as you has topman, there are other factors that will determine who appears on top. They are listed in order by points: Being married/BFF with a person of a higher position, being online, having purple power, having reghide power off, having a shorter username, and having a shorter ID number. Your ranking is also one.