Due to unfortunate gaps in my viewing, I wasn't able to make a full top 10 for each year of this decade. 


1949 : 
1. THEY LIVE BY NIGHT (Nicholas Ray)
2. OPRHEUS (Jean Cocteau)
3. STRAY DOG (Akira Kurosawa)
4. ADAM'S RIB (George Cukor)
5. THE THIRD MAN (Carol Reed)
6. STROMBOLI (Roberto Rossellini)
7. GUN CRAZY (Joseph H. Lewis)
8. ON THE TOWN (Stanley Donen/Gene Kelly)
9. KIND HEARTS AND CORONETS (Robert Hamer)
10. CAUGHT (Max Ophuls)

Runner-up: ONLY A MOTHER (Alf Sjoberg), THE QUEEN OF SPADES (Thorold Dickinson), TO JOY (Ingmar Bergman)

1948:
1. THE LADY FROM SHANGHAI (Orson Welles)
2. BICYCLE THIEVES (Vittorio de Sica)
3. LETTER FROM AN UNKNOWN WOMAN (Max Ophuls)
4. RED RIVER (Howard Hawks)
5. THE RED SHOES (Michael Powell/Emeric Pressburger)
6. JOUR DE FETE (Jacques Tati)
7. MEDITATION ON VIOLENCE (Maya Deren)
8. ROPE (Alfred Hitchcock)
9. FORCE OF EVIL (Abraham Polonsky)
10. DRUNKEN ANGEL (Akira Kurosawa)
Runners-up: THE BIG CLOCK (John Farrow),  THE FALLEN IDOL (Carol Reed), LOUISIANA STORY (Robert Flaherty), PITFALL (Andre de Toth), PORT OF CALL (Ingmar Bergman), SPRING IN A SMALL TOWN (Fei Mu), TREASURE OF THE SIERRA MADRE (John Huston), UNFAITHFULLY YOURS (Preston Sturges)


1947:
1. GERMANY YEAR ZERO (Roberto Rossellini)
2. MONSIEUR VERDOUX (Charles Chaplin)
3. BLACK NARCISSUS (Michael Powell/Emeric Pressburger)
4. SILENCE OF THE SEA (Jean-Pierre Melville)
5. OUT OF THE PAST (Jacques Tourneur)
6. DAISY KENYON (Otto Preminger)
7. QUAI DES ORFEVRES (Henri-Georges Clouzot)
8. FIREWORKS (Kenneth Anger)
9. ODD MAN OUT (Carol Reed)
10. T-MEN (Anthony Mann)

Runner-up: NIGHTMARE ALLEY (Edmund Goulding), RECORD OF A TENEMENT GENTLEMAN (Yasujiro Ozu), SPRING AWAKENS (Mikio Naruse), THE WOMAN ON THE BEACH (Jean Renoir)

1946:
1. ROME OPEN CITY (Roberto Rossellini)
2.  A MATTER OF LIFE AND DEATH (Michael Powell/Emeric Pressburger)
3. GILDA (Charles Vidor)
4. NOTORIOUS (Alfred Hitchcock)
5. BEAUTY AND THE BEAST (Jean Cocteau)
6. PAISAN (Roberto Rossellini)
7. THE BEST YEARS OF OUR LIVES (William Wyler)
8. THE BIG SLEEP (Howard Hawks)
9. LA BATAILLE DU RAIL (Rene Clement)
10. NO REGRETS FOR OUR YOUTH (Akira Kurosawa)
Runner-up: MY DARLING CLEMENTINE (John Ford), A SCANDAL IN PARIS (Douglas Sirk), STRANGE IMPERSONATION (Anthony Mann)

1945:
1. I KNOW WHERE I'M GOING! (Michael Powell/Emeric Pressburger)
2. DETOUR (Edgar G. Ulmer)
3. MILDRED PIERCE (Michael Curtiz)
4. LEAVE HER TO HEAVEN (John Stahl)
5. CHILDREN OF PARADISE (Marcel Carné)
6. LES DAMES DY BOIS DE BOLOGNE (Robert Bresson)
7. SCARLET STREET (Fritz Lang)
8. THE LOST WEEKEND (Billy Wilder)
9.  A DIARY FOR TIMOTHY (Humphrey Jennings)
10. FALLEN ANGEL (Otto Preminger)
Runners-up:  THE SOUTHERNER (Jean Renoir),  THEY WERE EXPENDABLE (John Ford)
1944 : 
1. DOUBLE INDEMNITY (Billy Wilder)
2. TO HAVE AND HAVE NOT (Howard Hawks)
3. LAURA (Otto Preminger)
4. A CANTEBURY TALE (Michael Powell/Emeric Pressburger)
5. HAIL THE CONQUERING HERO (Preston Sturges)
6. MINISTRY OF FEAR (Fritz Lang)
7. LIFEBOAT (Alfred Hitchcock)
8. MEET ME IN ST. LOUIS (Vincente Minnelli)
9. TORMENT (Alf Sjoberg)
10. WOMAN IN THE WINDOW (Fritz Lang)
Runner-up:  AT LAND (Maya Deren)

1943:
1. DAY OF WRATH (Carl Dreyer)
2. I WALKED WITH A ZOMBIE (Jacques Tourneur)
3. SHADOW OF A DOUBT (Alfred Hitchcock)
4. MESHES OF THE AFTERNOON (Maya Deren)
5. AIR FORCE (Howard Hawks)
6. LES ANGES DU PECHE (Robert Bresson)
7. THE SEVENTH VICTIM (Mark Robson)
8. THE LEOPARD MAN (Jacques Tourneur)
9. LE CORBEAU (Henri-Georges Clouzot)
10. HANGMEN ALSO DIE (Fritz Lang)
Runner-up: L'ETERNEL RETOUR (Jean Delannoy),  GOUPI MAINS ROUGES (Jacques Becker)

1942:
1. THE PALM BEACH STORY (Preston Struges)
2. CAT PEOPLE (Jacques Tourneur)
3. THE MAGNIFICENT AMBERSONS (Orson Welles)
4. TO BE OR NOT TO BE (Ernst Lubitsch)
5. SULLIVAN'S TRAVELS (Preston Sturges)
6. LISTEN TO BRITAIN (Humphrey Jennings)
7. OSSESSIONE (Luchino Visconti)
8. SABOTEUR (Alfred Hitchcock)
9. CASABLANCA (Michael Curtiz)
10. A PILOT RETURNS (Roberto Rossellini)

Runner-up: THERE WAS A FATHER (Yasujiro Ozu), WENT DAY THE WELL? (Cavalcanti)

1941:
1. CITIZEN KANE (Orson Welles)
2. THE LADY EVE (Preston Sturges)
3. THE 49TH PARALLEL (Michael Powell/Emeric Pressburger)
4. THE MALTESE FALCON (John Huston)
5. HELLZAPOPPIN' (H. C. Potter)
6. BALL OF FIRE (Howard Hawks)
7. THE SHANGHAI GESTURE (Josef von Sternberg)
8. UNFINISHED BUSINESS (Greogry LaCava)
9. MR. AND MRS. SMITH (Alfred Hitchcock)
10. SUSPICION (Alfred Hitchcock)
Runner-up: HIGH SIERRA (Raoul Walsh)

1940:
1. HIS GIRL FRIDAY (Howard Hawks)
2. FOREIGN CORRESPONDENT (Alfred Hitchcock)
3. THE SHOP AROUND THE CORNER (Ernst Lubitsch)
4. CHRISTMAS IN JULY (Preston Sturges)
5. THE PHILADELPHIA STORY (George Cukor)
6. GASLIGHT (Thorold Dickinson)
7. REBECCA (Alfred Hitchcock)
8. THE MORTAL STORM (Frank Borzage)
9. THE THIEF OF BAGHDAD (Ludwig Berger/Michael Powell/Tim Whelan)
10. THE GRAPES OF WRATH (John Ford)
Runner-up: REMEMBER THE NIGHT (Mitchell Leisen)