Oh, Simon, Simon, Simon...

One cannot simply invoke Ladyhawke and not mention the movies heart and soul, the alchemist who fuses what would otherwise be ridiculously incompatible elements into a truly satisfying whole: Leo McKern; his is a masterclass in what it takes to make a supporting role an integral role.

Without McKern, the film would have been little more than five minutes of Rutger Hauer wiping Matthew Broderick off his shoe. (Don't get me wrong, Broderick and Hauer are both actors whom I much admire but who, in style, temperament and charisma, are much like matter and anti-matter and who need a catalyst, like McKern, to work together.)

Agree with just about everything else on this list, with an emphatic nod of approval to the inclusion of Crouching Tiger, Hidden Dragon. And, while, I agree with your overall assessment of Legend, I still got call you out: if you're going to shout-out to Ewan McGregor for his relatively tame scenery-chewing in Jack the Giant Slayer, I wonder that you didn't mention Tim Curry who not only re-invents scenery-chewing in Legend, he more or less employs his fellow actors as tooth-picks to clean his teeth as he does it...

Though perhaps not a great film, in place of Jason and the Argonauts (also not a great film), I might have been tempted to include in this list 1983's Krull for its earnestness (with a young Liam Neeson AND a young Robbie Coltrane) and as much for the love I bear its director, Peter Yates (Bullit, The Friends of Eddie Coyle, Breaking Away...)

And, there is but one answer to the exclusion of The Princess Bride...

...Inconceivable!