1. Zodiac - A masterpiece. A mostly talky 3 hour movie with not a lot of big exciting set pieces and yet it's fascinating, paced better than a lot of superhero movies, and flies right by. I'd say it's close to a perfect movie.
2. The Social Network - Another movie that I think is close to a masterpiece. Jesse Eisenberg has never been better and probably never will be again. Just a pitch perfect performance. The mood, atmosphere, and score is still haunting and it feels like one of the most important films of the last 20 years.
3. Se7en - Not in Silence Of The Lamb's league, but still a great 90's serial killer movie. The more I watch, the more I appreciate Morgan Freeman's performance and it's one of his best. Pitt is kind of miscast here idk, he has some really great moments and some iffy moments but he's too much of an oddball actor to me to be playing this type of part. But it's not even that big of a problem. as the movie has so many memorable moments and big scenes. It's another movie that is paced really well and the seven deadly sin plot ensures it's always moving.
4. Gone Girl - Just a rock solid movie. Ben Affleck is perfect as Nick (Especially after reading the book, Affleck nails Nick's douchey essense), but I do find the first half following him sort of dull at times on rewatches. Rosamund Pike is so good as amy (Maybe too good cause it's hard to buy her in some of her recent parts). The whole casting is perfect with everyone nailing their role, although this is the movie I was starting to get impatient with Fincher's visual aesthetic.
5. Fight Club - I really like this movie, just the other four are better. It never really resonated with me like with the other four movies. Pitt and Norton are both great and this is Fincher clearly in the zone when it comes to his visual style. That style was getting stale in Gone Girl, but it fits this movie so well.
Also, since I don't think it was mentioned I do like his remake of Girl With The Dragon Tattoo a lot and I think his style elevates that movie.