The ones that aren’t [sequels or adaptations of ultra-bestselling books], in descending order of gross: …. Jurassic Park … Forrest Gump
Jurassic Park was originally a book by Michael Crichton, who was already a fairly well known author at the time. Wikipedia says that a bidding war for the movie rights started before the novel was even published. Forrest Gump was also originally a book, although the article on its author, Groom, indicates that it wasn’t a bestseller when first released, and I’ve heard it’s a very loose adaptation anyway.
Jurassic Park was originally a book by Michael Crichton, who was already a fairly well known author at the time. Wikipedia says that a bidding war for the movie rights started before the novel was even published. Forrest Gump was also originally a book, although the article on its author, Groom, indicates that it wasn’t a bestseller when first released, and I’ve heard it’s a very loose adaptation anyway.