I see Clash of the Titans (1981) frequently cited as being Ray Harryhausen's masterpiece. Titans is a good film, for sure, but for me there's no contest, Argonauts tops it. If I was able to plot on a graph how my love for stop-motion was established then the highest peak would represent Argonauts.
He's allowed free will but is nevertheless a pawn of the gods, aided by Hera (Honor Blackman) and hindered by Zeus (Niall MacGinnis). The power of prophecy to initiate action and of belief to sustain it is ever-present.
5 divine strategies out of 5