What was Dimitri Tiomkin’s final score? He died in 1979. According to IMDB, it could possibly be GREAT CATHERINE (1968).
The official site gladly has a proper filmopgraphy and also lists it:
Filmography
THE WAR WAGON right before that is also a good western score, the main title song is great. But in terms of “size” ROMAN EMPIRE is probably leading and it is great. Great re-recording by Tadlow, too.