There are two further sets to be released:

Vol 2.

Alexander Nevsky
Ivan the Terrible, Part One
Ivan the Terrible, Part II: The Boyars' Plot

Vol 3.

Time in the Sun (1940)
Que viva Mexico! (1932) or (1979) ? No idea which one .
Mexican Fantasy ?

Is the film you regard as his best amongst these?

Cheers Trev.