His most important people are MA, then the rest of SC. He might have some sympathy for Reiner too, since he said he came to understand that they are the same.
I'm not a fan of matricide thing, but if Carla's death was unavoidable, so were all other deaths leading to the moment when Ymir removes the curse and fucks off.>FG family, Karina and Moses right
What makes you think they are important to Eren? They were in the same position as all other refugees and survived because they are the parents of important characters, not because Eren did something to save them.