Apocalypse now
Jaws
Goodfellas
Once upon a time in the west(that damn annoying fly)
Ghostbusters
Sunset Boulevard(I like how the narrater is the one face down in the pool)
These are a couple that come to mind
Nice!
I always use
Apocalypse Now to illustrate the use of dissolves, not just visual ones, but audio dissolves. (choppers, ceiling fan blades, his brain "on fire," and his opposite, Buddha. And of course, for the use of music & lyrics! Guys are always glued to that one.
I used to use
Sunset Boulevard, but found that younger generations were just not recognizing the guy alive at the typewriter as being the same guy dead in the pool. It still works for them if they watch the whole movie. But not recognizing William Holden's voice, the storytelling hook at the beginning is lost on them.
Billy Wilder's original opening was set in a morgue, each corpse with its toe tag, and Holden's corpse telling the others the story. But the pre-release test audience thought the scene was hilarious! They were unaware that dead bodies were given toe tags, and they thought they were price tags. So Wilder re-wrote the opening and shot it the way you see it.
For the pool scene, there were no cinematic cameras then that were waterproof or able to shoot underwater. One of the camera assistants came up with the idea of putting a large mirror on the floor of the pool, and shooting the image in the mirror from above the water. And that's the perspective you see today.