The Battle of Britain, some of the best, acting and historical accuracy. Cinematography and music were also outstanding. Incidentally, the Memphis Belle film from the 90's is largely BS, I have been good friends with Linda Morgan, widow of Col Robert Morgan, the pilot of the Memphis Bell for years. There are 2 videos on YouTube that give excellent accounts, one is titled "Memphis Belle, The Story of a flying Fortress" it was filmed on the Belle by William Wyler in 1943 during combat missions. The other tells the complete history of the Belle and was produced by The National Museum of The United States Air Force in Dayton Ohio, it's about an hour and is excellent. Find "The Memphis Belle, Her Final Mission " on YouTube. After completing 25 missions in Europe from England, Morgan's crew and the Belle returned to the States and flew a national war bond tour. Col Morgan and some of his crew then went to the Pacific and flew 26 missions in a B29 named "Dauntless Dotty". Col Morgan's book, "The Man Who Flew The Memphis Belle" is a good read if you can find a copy.
Some additional information, the nose art on the 90's film Belle isn't correct. The nose art an the actual Belle is trademarked by the Museum/USAF and they wouldn't allow it to be used in the film. The Belle was removed from display in very poor condition in Memphis and taken to the museum at Wright-Patterson where it underwent a meticulous restoration for 13 years to it's exact appearance after its last mission in 1943. I was present when she was unveiled May 18th 2018. It is totally worth a trip to see her, but also the museum is beyond description.