If you want dark from the 80's (I know, you said it's not your thing), watch a movie called Cut and Run about the horrors of the Central American drug trade and the ruthlessness of the cartels. I'm going off of memory here back almost 30 years, but it was downright disgusting, but I couldn't look away. My parents totally shouldn't have let me see that movie.
Another one that's a bit more fun that I remember was Night of the Comet. It was a dark zombie/post apocalyptic movie, but I don't remember as much graphic violence as your average modern zombie movie. I remember there being a lot of fun involved in taking the reigns of an abandoned modern infrastructure.
On a lighter note, check out UHF, which coincidentally spoofs Indiana Jones in the opening scene. It was a goofy comedy starring Weird Al Yankovich and Michael Richards before his Seinfeld fame as Kramer. It was completely ridiculous in every way but I have a soft spot for it. I can't help but laugh even today when I watch it.
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