In each version of Hamlet the movie, the director tries to display the ghost scene the best they can. To me, i think the Branagh version is where the scene is most dramatic. There are certain effects that makes it stand out such as the gloomy backround, the smokey foggy ground, and the blood pouring out of his father's ear. In this one, the Ghost is more frightening to Hamlet, which was the dirctor's goal.
The Zeff ghost scene seems a little more toned down. The mood is still a little eery, but not as scary as Branagh's. The director focuses more on the actual arrival of the ghost, which makes more of an emotional impact. Even though I like Mel Gibson as an actor, the version with him in it may be the least appealing. I think there is a tie between Branagh version and Almereyda version. I reccomend these two. These two films are more enjoyable to viewers, and it displays Hamlet better.