The Fourth Man is a 1983 Dutch suspense film directed by Paul Verhoeven. Violent and with full nudity, keep those things in mind as you decide whether or not to watch it, but in the U.S. this was the highest-grossing Dutch film of all-time. You can watch it online here.
Empire Online concludes with this: "The darkly comic sexual obsession is complemented by Verhoeven's stylish eroticism, wild religious iconography and plentiful nudity." Time Out calls it "a deliciously overripe male melodrama based on a novel by Gerard Reve and packed with ostentatious, tongue-in-cheek symbolism". Moria gives it a positive review and calls it "an amusing homo-erotic take on Don’t Look Now (1973)". DVD Talk recommends it for anyone who likes suspense films.
Empire Magazine includes it on their list of "The 100 Best Films of World Cinema". Rotten Tomatoes has a consensus critics rating of 100%.