I think it's amazing that anyone could find "Doom" or "Crusade" to be superior to "Raiders."
"Raiders" is a perfect adventure film. There isn't a moment wasted or a character that's uninteresting, and none of the humor is over-the-top or out-of-place.
"Doom" is a corny movie under the guise of a "darker" film. I hate Willie. The bad guys are bland and boring. In general ... the movie isn't very good. It's lucky that it has some fun moments. The best thing I can say about it is that they definitely tried to do something different from "Raiders" instead of copying it.
"Crusade" is just the opposite. It's a carbon copy of "Raiders" with a different religious MacGuffin, Brody's character is completely ruined, all the humor is campy and out-of-place, and don't get me started on the young Indy sequence. The best thing I can say about it is that any time Sean Connery and Harrison Ford are together in a scene, it's fun to watch them play off of each other.
"Skull" is pretty much the same as "Crusade," but without any heart, and all the secondary characters are boring. I didn't mind the alien thing, but the CGI was way over-the-top, and the humor was just far too much. But the graveyard scene was brilliant - hell, everything from Indy meeting Mutt until the graveyard scene was over was pretty damn good. The rest ... yeah.
"Raiders" 10/10
"Doom" 5/10
"Crusade" 6/10
"Skull" 5/10
Basically, you have "Raiders," one of the greatest films ever made ... and then three shitty movies Harrison Ford starred in that had "Indiana Jones" in the title.
And I just realized that this is INCREDIBLY off-topic, so I'll stop typing right about ... now.