The Fly (1986)

A brilliant but eccentric scientist begins to transform into a giant man/fly hybrid after one of his experiments goes horribly wrong.

David Cronenberg's third and final selection on this list.

The greatest horror remake of all time?  That would be The Thing.  But The Fly is a not-too-distant second.  I love the original movie, but this one runs circles around it.  Jeff Goldblum is spectacular as the "Brundlefly", subverting the nature of the accident in the original film in a very clever (and creepy) way.  And man is this movie ever creepy.  Not to mention disturbing.  There are several scenes in it that really stuck with me as a kid after watching it.  One in particular is sheer nightmare fuel.  Cronenberg really knows how to get under your skin.

Hellraiser (1987)

A woman discovers the newly resurrected, partially formed, body of her brother-in-law. She starts killing for him to revitalize his body so he can escape the demonic beings that are pursuing him after he escaped their sadistic underworld.

Speaking of skin puns...

Clive Barker is a great writer.  I've read a number of novels and short stories of his that are truly gruesome and horrifying in clever ways.  Highly recommended.  Sadly, most of those works were never adapted into films.

Luckily, we got a handful of truly fun adaptations in Rawhead Rex, Nightbreed, and Lord of Illusions.  Fun, gory movies.  But Hellraiser is the runaway winner.  This movie is a sickeningly fun time, with copious blood and gore, and a cast of truly revolting villains.  And I'm not even talking about the Cenobites.

Just ignore every sequel outside of the second movie.  And even that one can't hold a candle to the original.

Street Trash (1987)

A liquor store owner sells alcoholic beverages to homeless people, unaware of what the bottles actually contain: toxic brew.

..and yet Hellraiser isn't nearly as depraved and disgusting as this movie.

Ever seen any Troma films?  Like The Toxic Avenger or Class of Nukem High.  Because if you have, then you'll understand when I say those movies have a particular "feel" to them.  It's a thing 99.9% of the general population will not want anything to do with.

Street Trash is what happens when a filmmaker decides to one-up Troma, and make a movie that's more depraved, more disgusting, filled with even more bodily fluids, dismemberments, and the sort of non-PC moments that only the 1980s could get away with.

Don't watch this unless you have an iron constitution.