Yes, there are tons more than I can think of readily, but one would be Stephen King's "Christine".
There are quite a few horror movies with such a scene. But just to name one, Jeepers Creepers 2.
There is a scene in the movie Species with a woman's spine being ripped out.
The movie Phantasm has a scene that a cut off finger oozes yellow goo.
Although much copied, the original horror movie with the shower scene and knife was Alfred Hitchcock's Psycho. The scene showed Janet Leigh's character getting stabbed to death in the shower by what appears to be an elderly woman. This scene is consider a classic horror / suspense film in cinema. Innovations included interesting camera angles and a tense musical score.
I don't know of any movies that have a scene like that which takes place in an attic, but try the movie "Prince of Darkness" directed by John Carpenter. There is a scene where a lady possessed by a demon is trying to pull Satan through a glowing mirror. Sounds like it could be it.
jillans theam song
Yes, the dog dies in the 2005 version of The Amityville Horror movie. It is shown being beaten to death by the father in a disturbing scene.
the saddest movie i have ever seen in the movies is boy
Angry Red Planet in Sci-fi, Devil Bat in Horror.
nighmare on elm street
I believe it was The Shining by Stephen King
im gonna say benny and joon