The info on the wrasses is backwards. H. ornatissimus is more aggressive than H. claudia. Also, H. Biocellatus is often called a red xmas wrasse, and there is a couple Thalassoma species(very aggressive) that can be called chritmas wrasse.Look into Purple Tangs some more. They're gorgeous when you see a healthy one. For your wrasse question, it depends. A "Christmas Wrasse" can be two fish. Halichoeres claudia is sometimes classified as a "Christmas Wrasse" and is really aggressive. If you have that fish, I wouldn't recommend the flame. If you have Halichoeres ornatissimus, which is a much less aggressive species, I would go for it! Cirrhilabrus jordani(Flame Wrasse) is an amazing fish, and I love mine. She's so active I can't get a decent picture. Let me know if you have any trouble sourcing a Flame, I'll be able to get you a discount on our site.
Wow! That's incredible, how did you manage to keep the aggression low? Two Zebrasoma's in an 80? One of my friends was worried about two in a 600 gallon.
The fairy wrasse suggestions were great. Purple tilefish are decent sized and a showy purple. A bellus or watanabi angel is reef safe and impressive looking.