It's hard to think of many movies above the crap level that are not "execution dependent". An "execution independent" script has to be so good it works as a bad production. The reverse is more likely. Action movies today are quite often great executions of a mediocre script. Especially action movies, most of which don't hold together if viewers have enough time between the explosions to think about the plot and dialo…
You might say generic rom-coms, or a retread of a Shakespearean play have proven to be consistent and execution independent. Television medical dramas or other formulaic TV might also fit the bill. They're not immune to execution flaws but they have a clear winning formula.
Good point. There are lots of theater pieces which merely need competent actors to be OK. The bar for a successful movie today, though, is higher. Viewers expect very high production values to justify the overpriced popcorn.