I’ve always felt that Indiana Jones and the Last Crusade (’89) is the most satisfying of the four Indys. Because it’s the funniest and most serial-like (a series of amusing, thrilling, well-choreographed skits that deliver on their own terms and don’t rely on any kind of feature-length narrative cohesion). It’s also the most nimble and assured effort within the realm. Director Steven Spielberg seems more relaxed with the comedic-romp aspects here than he was with the other three (Raiders, Temple of Doom, Crystal Skull).
Crusade is the only one of the four that I own on Bluray. That means something.