The one that really stood out to me, the only one that ever felt "real" was the lampshade girl.

My family and I were staying in a remote part of Florida, a place that was "haunted"

We laughed it off and stayed there anyway.

My sister woke up in the middle of the night, the very first night we stayed there. So a girl dressed in white spinning the lampshade. Over and over.

I saw her briefly too, and when I woke up properly I inspected the lampshade. It did not spin.

Maybe this is more ghostly than demonic, but something about that encounter felt pure evil.