Here is why I don't rate Raiders first. Indiana Jones does nothing to affect the outcome of the plot. The only thing that would have been different if Indy hadn't interfered is that the arc would still be in the Nazi base instead of in the hands of the Americans.
The action, the acting, the pacing are all great but I have never been able to get over this gaping plot hole.
There are fans who say the SAME EXACT thing about James Bond's role in "Goldfinger", which as most of us know is the most widely lauded Bond film overall. (Some say "From Russia With Love" and "Casino Royale" are the best as well, but Goldfinger is clearly the one that launched the series into a full blown money-making franchise).
Which is funny because I think it was Spielberg who said he saw Bond as Jones' father, which is why Connery plays Ford's father.
Pretty cool.