As Talenel and Shalash are Heralds, they got their abilities from the Honorblades, and it is highly unlikely that Shalash still has hers.
And then Talenel. He was left behind when the other nine heralds broke the Oathpact. He had died, so he had gone back to Braize. (AKA Damnation).
But he returned to Kholinar, and he still had his honorblade.
So, I wouldn't count either of them as Radiants, as Honorblades do not make someone a Radiant, but simply grant the bearer the abilities of a Radiant of a specific order.
Two more things.
You might want to reread the prolude to the SA.
You might also read this article on Talenel. It has a lot of great information on him.