You’re forgetting Loki. Don’t worry, he’s okay though! And Vision. Don’t worry, he’s back for Wandavision!
And, even with Black Widow dead, thankfully they can make a prequel movie!
Just to age myself a bit: One thing that I really liked about Aeris’ death in FF7 is: There’s no dying speech. There’s no ghostly message from beyond the grave. You don’t even really get to see her face in wistful memories. Everything about that character is completely ”ended” from the media the moment Sephiroth strikes her. Post-launch media tended to ruin this, but at the time it was an important treatment of death to make it impactful.
We all know magic like prequels, time travel, Lazarus pits, cloning, etc, can bring back dead people. That usually misses the point because death in media is usually meant to hold an emotional power that relates to its certainty - it’s not specifically reliant on logic.