How could you exclude Snowpiercer, though!
Honestly, his entire filmography is just varying degrees of great. I think Barking Dogs is his weakest film, and even that is excellent.
Also Okja is on Netflix for those interested in checking out more of his work after seeing Parasite.
Edit: Also, Every Frame A Painting has a number of videos exclusively about or heavily featuring his films and I can't recommend those analyses enough.
As you go through his films, see if you can keep count of how many times people dropkick somebody or something, particularly rear view mirrors.