Wow.
See "Raiders." That's all I can say. You don't need to see the others, they don't really matter at all. They're very, very mediocre in comparison. I don't know how Vaderisnothayden can really think that it is a bland, uninteresting film, and I especially don't see how he can think "Temple of Doom" is better. Or "Last Crusade," for that matter.
Let me reiterate that I don't hate any of the "Indy" movies, even "Crystal Skull" - it's just that all three of the sequels are vastly inferior to the original. In my opinion, there's "Raiders," then there's a trilogy of inferior spin-offs that, while fun, aren't particularly good, while "Raiders" is a cinematic masterpiece.