No Tangs in a 65 IMO unless short term. You could get away with a Kole, Tomini, Squaretail or White Tail Bristletooth but long term I’d have them in at least a 75- gallon 4’ tank, 90 gallons even better.
The Purple will have to be re-homed or if you upgrade to at least a 125 gallon long (6’ tank). Blue Velvet Damsel is super aggressive and will have to be removed.
If I were you I’d do:
2 Ocellaris Clowns
1 shrimp and goby pair
1 Starry, Tailspot, Bicolor or another Blenny
1 pygmy angel (they’re among the most reef safe angelfish)
1 Royal Gramma / Blackcap Basslet / Swissguard Basslet or 1 Yellow / Randall’s / McNeill’s Assessor
1 sand sifting goby (as you already have)
1 Yellow Coris / Melanurus Wrasse
1 smaller Fairy / Flasher Wrasse
(You could replace the pygmy angel with another smaller- 4” and below Fairy / Flasher Wrasse of your choosing, or a Possum / Pink Streak Wrasse)
Oh wait, you want more active fish right?
If that’s the case choose one between a shrimp and goby pair or a blenny, one out of the two, and you could do another wrasse (smaller one), a Firefish, or a Scissortail / Zebra / Blue Gudgeon Dartfish.
The Six Line / Mystery / Eight Line / Four Lines can get aggressive. The Firefish / Dartfish need a tank without gaps, wrasses too. Gobies and blennies too. Most fish really. If you like a slower, hovering fish, PJ Cardinal or Bangaii Cardinal will do.
Chromis kill each other off unless in bigger tanks and unless being fed often. That seems to be the anecdotal consensus. Correct me if I’m wrong but a single Blue / Green Chromis or a single Blue Chromis (Atlantic species) should be fine, so that’s yet another option.