Templars I gather you are something of a naval enthusiast, so I am quite sure you must know the movie Sink the Bismark. Things certainly looked right, Bismark appearing more or less as it should, with the possible exception of the interspersed footage of British 2pdr AA guns in action against the Swordfish attack. Now the story line itself is somewhat historically accurate, the Bismark does sink after all, but characterization was perhaps kind of off. I don't think Lutjens was quite the fervent Nazi he was portrayed to be in the film. Still, I love that movie.
Battle of the River Plate was another one, historically more or less accurate, rather decent character portrayal, but I think we can agree that the Admiral Graf Spee bore very little resemblance to an American heavy cruiser.
There are so many films where details are present, but mostly overlooked. Perhaps you have seen the film, The Eagle has Landed. You might remember the German STG III assault gun lashed to a flatcar in the opening scenes of the film. It was only on screen for a few moments and really contributed nothing to the plot and I am willing to bet that very few people even noticed it. The same could be said for the use of the JU52 transport in Where Eagles Dare, or the 20mm flak cannon in the same film. Little details that contribute nothing.
I am no expert on the Persian army that attacked the Spartans at Thermopalye, but I am pretty sure that they looked nothing like Orcs as they did in the film The 300.

Hollywood is not about historical accuracy, its strictly about turning a buck. We can wish otherwise, but that wish is most likely to go unsatisfied.

Best naval movie, in my opinon...The Enemy Below, Robert Mitchum just makes a Hell of a good destroyer commander and Curt Jurgens as a sympathetic German sub driver. It was just inspirational, so inspirational that it inspired a Star Trek episode called The Balance of Terror.

See you in the movies