During Dance of Dragons we know exactly which dragons died in combat or riots:

The slain dragons included Vhagar, Caraxes, Syrax, Arrax, Tyraxes, Vermithor, Sunfyre, Vermax, Vermithor, Dreamfyre, Greyghost, Seasmoke, Morghul, Shrykos, Tessarion, Moondancer, Stormcloud & Melys the red Queen.

We know that [Sheepstealer][1] slipped away during the dance with her rider and was never seen again. But at least he survived. 

The surviving members of House Targaryen at end of the dance were following:

 1. [Aegon the Younger][2] - Lost his dragon [Stormcloud][3] while escaping from forces of the three daughters. 
 2. [Jaehaera Targaryen][4] - Lost her dragon [Morghul][5] during [storming of dragonpit][6]
 3. [Rhaena Targaryen][7] - Lost her hatchling hours after birth. Eventually bounded to dragon [Morning][8]. Morning survived the dance.
 4. [Baela Targaryen][9] - Lost her dragon [Moondancer][10] in fight against Sunfyre the golden. 
 5. [Viserys II][11] - Presumably Lost his egg during captivity. 

I believe that TWOIAF names four dragons to be known survivors of the dance.

So far I have been able to name only two:

 1. Sheepstealer
 2. Morning

Which are the other two dragons who survived the civil war?

  [1]: http://awoiaf.westeros.org/index.php/Sheepstealer
  [2]: http://awoiaf.westeros.org/index.php/Aegon_III_Targaryen
  [3]: http://awoiaf.westeros.org/index.php/Stormcloud
  [4]: http://awoiaf.westeros.org/index.php/Jaehaera_Targaryen
  [5]: http://awoiaf.westeros.org/index.php/Morghul
  [6]: http://awoiaf.westeros.org/index.php/Storming_of_the_Dragonpit
  [7]: http://awoiaf.westeros.org/index.php/Rhaena_Targaryen_(daughter_of_Daemon)
  [8]: http://awoiaf.westeros.org/index.php/Morning
  [9]: http://awoiaf.westeros.org/index.php/Baela_Targaryen
  [10]: http://awoiaf.westeros.org/index.php/Moondancer
  [11]: http://awoiaf.westeros.org/index.php/Viserys_II_Targaryen