Wow, that guy could have made worse choices in his wrasse stocking but it wouldn't have been easy......LOL. Two thalassoma wrasses in a tank that size will become one and then the survivor will likely take out all the other wrasses when it's mature.
Read this article written by one of R2R's own wrasse experts. It will help you decide what's appropriate for your tank. Bring any questions or just your stocking list to the fish forum and you'll get good advice on which ones are appropriate.
https://www.reef2reef.com/threads/all-about-reef-safe-wrasses-in-aquaria.259894/