List of unnamed Tholians.
When the ISS Enterprise crew was attempting to commandeer the Tholian-held USS Defiant, they destroyed a Tholian vessel and captured the pilot, beaming it into the ship's decon chamber. Phlox proceeded to torture the Tholian by lowering the temperature in the chamber until it gave them the location of the Defiant. When the Tholian later attempted to send a signal to its people, Phlox killed it by lowering the temperature until its carapace shattered. (ENT: "In a Mirror, Darkly")
This Tholian officer, involved in the Temporal Cold War, was aboard the starship that contacted Enterprise NX-01 and requested the release of the time travel pod the Earth starship discovered in 2152. (ENT: "Future Tense")
In 2379, Romulan Senator Tal'aura claimed to have an appointment with the Tholian ambassador to Romulus. However, this may have been a ruse to excuse herself, as thalaron radiation was then used to kill the members of the Romulan Senate. (Star Trek Nemesis)