The 3 that come to mind for me are Shaun of the Dead, Hot Fuzz and The Princess Bride. All three are poking fun at their respective genres but also are great examples of the genre. I’m curious if Lemmy has other such examples.
Galaxy Quest
It’s legitimately one of the best Star Trek movies.
There is a curse in the Star Trek movies where every other movie in the franchise is terrible. The first one is bad, the second is good, the third is bad, and so on. This almost fits perfectly, but it inverts from the 10th movie onwards. The 9th is bad, the 10th is bad, the 11th is decent, the 12th is bad…
However, if you add Galaxy Quest into the line up, then it’s the good Star Trek movie between the 9th and 10th, and the pattern holds.
It’s been a while since I watched it, but I think Kingsman fits that description.