Just 4?
Oh man... That selection is impossible to make... I'll limit myself to more or less recent films so as to counterbalance my usual cynicism regarding modern movies.
Triangle of Sadness
(pure, unadulterated genius - the second act is perfection)
Suspiria
(the best remake of a classic film I've seen in ages)
The Substance
(in-your-face gonzo exploitation that has an actual point to it, I went in blind and loved it)
Kiss Kiss Bang Bang
(admittedly not all that recent, but man this is the perfect popcorn flick, I can't not have it on here)