"The Big Lebowski" is a movie that I would recommend to anyone. It's really funny and the main characters repeat many of the same expressions throughout the movie.
"Coming to America" is another great comedy starring Eddie Murphy. Some cultural references may go over your head, but it's a classic and it uses a lot of simple English.
"Pulp Fiction" is one of my favorite movies because it tells the story in such an interesting way. It's great if you want to learn how to swear in engish lol. It is really really violent and could be offensive to some, but it is a cinematic masterpiece nonetheless.
"The Office (the American version)" was one of the most popular television shows in America. It is a really good option for learning American slang and sayings. It's also hilarious.
I'll just list some others:
Game of Thrones (television, a good option if you want to hear British english.)
Dumb and Dumber
South Park (television)
Hopefully something on this list will work for you. Feel free to message me if you want more suggestions. Good luck!
The family man
The King's speech
Meet the parents
Meet the fockers
I watched these films and I think that they are easy to understand for a non native english speaker.
I agree with you . For me, watching movies and series is the best way to gain more vocabularies .
Here are some movies and series perhaps you'll find it useful
-the theory of everything
- Sherlock Holmes