Necromancers are inherently evil. I don't understand something; the knight at least had some people left alive, but the Necromancer waited until they were all killed? He acts only for his own benefit; he has neither fighting spirit nor a feeling that sometimes allows him to do things not as "right," but as his heart dictates. Your example is quite stereotypical; why did you decide that the knight would act exactly like that and not otherwise? You don't take into account the human factor, which gives people strength, the feeling that makes them protect others, sacrificing themselves.
P.S. "fan" is a strong word; I just like playing as them, but in real life, I would prefer to be a knight in golden armor and do good, rather than destroy everything.
And one more thing... I liked the information because of Agrael, who, although transformed, still had his own will and did not want to harm Izabel.

Yes, smart people have noticed that we think in terms of pre-defined patterns. But why did you decide that Necromancers are evil? What was the basis for this conclusion? Was it based on their actions or your sympathies and antipathies? Who told you that the knight does good? By the way, I recently read a very interesting article: during one baronial uprising, the rebels (barons and many ordinary peasants) created a flag – an eagle tearing a snake. They believed that this flag reflected their noble aspirations because everyone considered the eagle to be noble and the snake to be vile and disgusting. But in reality, the eagle is something false and insidious, hidden behind a mask of nobility, and the snake is a rejection of habits for the sake of noble deeds (only a few know this). And in the very first battle, the barons sent a crowd of peasants ahead, and while the regular army was killing them (without suffering any losses), the heavily armed barons approached and engaged in hand-to-hand combat, in which they were unmatched. They did lose the battle, though; the reserve forces crushed the barons. And the peasants were afraid to even pick up weapons for a long time.