I don't know enought Kurosawa but I'd say overall your right. You should know that in the four books of great movies he published before his death Roger Ebert listed no less that SEVEN films of Spielberg's as masterpiece. (He died in 2013.)

hERE's the list more or less chronologically:

Jaws

CE3K

Raiders of the Lost Ark

Et

tHE Color Purple

Schindler's List

A.I.

kUBRICK had six. Scorsese had eight. Hitchcok had at least nine. Werner Herzog, I should add had seven and Chaplin had six. (However Ebert made it very clear he prefered Keaton to Chaplin)

He was also very big on Bergman I think he may have been the leader with at least eleven.

Of course Ebert died in 2013 and was not prepare to declare many of the movies in the 2000s among the all-time greats at that point. I think the most recent American film in that list before he passed was Eternal Sunshine of The Spotless Mind. (There were a couple of international films.)