Tank Girl. It may just be a guilty pleasure but I'll defend it.
I guess Starship Troopers is THE movie for this, although I'm always suprised to find out people used to like it unironically.
Due date, with Robert Downey Jr and Galifianakis is a surprisingly earnest soft remake of Planes, Trains and Automobiles and nobody remembers it exists.
Speaking of unexpectedly fun raunchy comedies, Booksmart.
I want to say The Long Kiss Goodnight, but man, the action in that is janky in exactly the ways modern action movies get right, so it can be a rough watch if you're not ready. It also reads worse now that there's a million John Wicks. Still, ahead of its time and actually well written.
Does Slither count? I feel like it's on that Tremors territory where everybody knows it's cool and ironically that thing, so it may not count. Somebody said Cabin in the Woods below, so... maybe it does count.
Oh, Ready or Not. It's actually really funny and kind of a looser take on Knives Out as a horror movie. Good stuff.
The original TMNT movie should have sucked. How they snuck that tone into a whole movie before they made them tone it down for censorship and toyetic tie-ins is anybody's guess.
Brick doesn't count. Does Brick count? I think it doesn't look like it'd suck, it's just people don't know about it. I mean, if I tell you "film noir by way of high school drama" you may get the wrong impression, so... maybe?
And I mentioned it below, but 2001 Metropolis is awesome despite a lot of people not being able to get past the designs or even being aware of what it is.