Tangs need a large tank that is mature with good water flow and airration. They need a tank that is 100 US gal, or larger. Your tank converts to 35 US gal and that is too small for tangs. There is a thread titled "Yellow tang in a 55" on this site. Use the search function next to quick links (above).
The wrasses are great community fish with a variety to choose from. Will do well with most any fish, if they are the only one from wrasse group.