It depends on the situation.
If he doesn’t survive till the end, I will be bawling my eyes out from its sockets and let all the tears flow. As much as I like happiness, if this story is supposedly to be tragic, I want to experience the feels.
If he survives and has his own happiness, that’s fine as well.
Still, his happiness and what I consider his happiness are two different things.
I suppose our opinions clashes because I am not expecting Kaname to survive until the end but I am also not expecting something romantic to be happening between Zero and Yuuki even if Kaname’s dead.
In respect to his memories, actions and contributions.
I know if Kaname’s dead, Yuuki will end up with Zero as the default pairing, (and, how do we get a default pairing when it’s not even a video game?), and if she does, it doesn’t mean it’s going to be in romantic sense.
It can be a platonic love.
A knight protecting his princess.
If there’s death, there will be time to heal.