Superman: The Movie.
Reeve is superior to Keaton and Gadot. While Keaton is a good actor, he does not embody Batman as well as Reeve embodies Superman. While Gadot is a great embodiment of Wonder Woman, she is definitely not as good an actor as Reeve, charming as she is.
Compared to B89 and WW, STM's story is better at being compelling all the way through.
The supporting cast of STM trumps the supporting cast of both B89 and WW.
B89 easily has the best villain. While its popular to hate on Hackman's Lex, he is definitely superior to any villain in WW.
Clark/Lois has the best romance, but Diana/Steve isn't far behind.
The score for both STM and B89 blow away WW's.
Which leads me to my next point. Some people think that STM and B89 being of their time somehow hinders both films. WW is just as much a product of its time, and this isn't necessarily an advantage. In some ways, it falls into the cliches of most 21st century superhero films, like a weak, CGI and explosion heavy third act, unmemorable villains, and an unmemorable score.