The Creator pantheon (which may encompass all or only part of the Evanuris) was said in World of Thedas 1 to be a family. However, it wouldn't be the first thing in the lore book that was later contradicted in the game; the explanation of course would be that the family version was what the Dalish believe was the case but not actually the true situation.
So what the Dalish believe is that the world was created by Mythal, goddess of motherhood, justice and protection, and Elgar'nan, god of fatherhood and vengeance. Their eldest children were the twin brothers, Falon'Din and Dirthamen. Next in line was Andruil, followed by Sylaise and finally June. Ghilan'nain was not one of their children, having been a regular elf who was as follower of Andruil, subsequently raised to godhood by her. Then there is the other group of gods, the Forgotten Ones, but it is not clear how many of them there might have been but so far we have the names of Gelduran (from JoH), Anaris (from Masked Empire) and another dude whose name escapes me that was attached to some artefact.
In the Temple of Mythal Falon'Din, Andruil and June were left outside the inner sanctum but I don't know if that was meant to be significant or not. It has always seemed odd to me that if any of the gods had not been on good terms with Mythal at the end and caused her death, why would they still be honoured in her Temple? Would her servant Abelas really be in ignorance of the culprit when he could claim with such certainty that Fen'Harel was not responsible? I think this is another of those cases when someone could have told us much more but in the interests of maintaining the mystery the writers chose not to let them. After all, when Solas tells us the reason he moved against the Evanuris, my Dalish at least would have liked to have said "Do you mean the people we call the Creators?" and "So who did murder Mythal and how?"
The only god he specifically mentions by name is Falon'Din, when he recounts how he created a bloodbath of victims when insisting they worship him and Mythal had to sort him out, which she only did when his actions threatened her people. In a similar way she only took Andruil to task when the other gods became fearful of her actions in the Void and feared they would hunt them. So it definitely seems like Mythal only intervened in the affairs of other gods if their actions directly affected her or other people requested it. Most of the other new references to the activities of the Creators come from the codices we find in the Temple of Mythal and during our time exploring the Crossroads. So presumably they were records left by their followers, although some of the texts we find in the Library are hinted to be the memories of Solas himself. Then there was the additional text which was the warning by the Evanuris against Fen'Harel. Again there is no indication exactly which gods these were or how many but their description of him seemed spot on.
Elgar'nan was said to have had a huge statue built of himself and we find a giant hand in the Exalted Plains, which could possibly be the remains of the statue. So it would seem that he was at least by this time rather full of himself. However, the text about how Mythal intervened in a dispute between Elgar'nan and Falon'Din seemed to indicate they both respected her enough to listen. This would make sense if one was her husband and the other her son. In view of what happened with Andruil when she tried hunting the Forgotten Ones in the Void, I wonder if at the end the entire pantheon hadn't succumbed to some sort of madness, perhaps as the result of red lyrium?
Still, without specific names, I'm loath to blame all the Creators for Mythal's death. We only have Solas word to go on for that; they clearly didn't think of him as one of their own; their followers in the library seemed distressed at their loss and Flemeth only says that Mythal was betrayed, without stating by whom. Our own concept of justice is innocent until proven guilty and the only witness at present is someone who is notoriously evasive when it comes to the truth, so I'm waiting for a bit more information before condemning the entire pantheon.