The best Spielberg is tough because you are choosing between spectacle and drama. As far as his big blockbusters, Jurassic Park is probably the best. Obviously a large part of that is the time I was born, but it really is one of the all-time action films. As far as dramas, I might start putting The Fabelmans over Schindler's List.
Per Matthew Belloni and the Town newsletter On WB seeing ‘Cut Off’ as a unreleasable film: "Warners’ Mike and Pam reality check: Assuming the poorly received Supergirl underperforms this weekend (see prediction below), the timing isn’t great for James Gunn and Peter Safran, whose post-merger future running DC will likely soon be decided by David Ellison and the Paramount crew. It also highlights vulnerabilities in the overall Warner Bros. slate. Alas, Warners had scheduled a Jonah Hill–Kristen Wiig comedy, Cut Off, for July 17, but that movie is said to be unreleasable and is now not scheduled. Animal Friends, a Ryan Reynolds–Jason Momoa R-rated animation/live-action hybrid from Legendary, has been delayed a ton and was recently pushed from June to January.” Man, Jonah Hill reallly fell off.