Superman: Last Son of Krypton is 1970s Superman novel by Elliot S! Maggin. It was originally proposed as the idea for a Superman movie, and the novel was released as a companion to the first Superman movie - although the plot and characterization (especially that of Luthor) differ greatly from the movie.
In it, Einstein is Jor-El's initial choice for raising the infant Superman (a probe in his rocket was designed to automatically scout out the smartest being on Earth). Einstein, being too old (and too tightly-watched by government agents) to raise children, instead performs a bit of trickery to get a kindly Kansas couple to find the rocket.
In Back to the Future, Doc Brown's 1985 dog is called Einstein, who is his first living test subject for his time-travel experiments, and much of the movie takes place in 1955, the same year Einstein died. Doc also keeps a portrait of Albert Einstein in his home, alongside Thomas Edison, Sir Isaac Newton, and Benjamin Franklin.
IQ (1994 film). Walter Matthau plays Albert Einstein as a romantic matchmaker between his niece (and highly intelligent doctoral student at Princeton University) Catherine and local auto mechanic Ed Walters.
Albert Einstein: What she needs is to go out with someone like you. The problem is...she would never go out with someone like you.
Ed Walters: Well that's easy, just lend me your brain for a couple of days. [beat] What?
Albert Einstein: Are you thinking what I am thinking?
Ed Walters: What would be the odds of that happening?