Thank you for this beautiful query. I am no one to claim anyone alive or dead. It is for them to find out.

There are few physical bodies that are breathing, and their clutter of minds is dead/cleared. They fully live here, but don't function like masses. What would one call them - dead or alive?

While there are few bodies bed ridden, and mind is super active in every direction and depth. What would one call it?

Few people consider themselves as living dead bodies, few consider themselves as ever alive even when their bodies are dying.

Death is not related solely to body. It will perish one day. If we have to understand life, we have to realize what death is - how to die every moment in order to live fully.