>>211487550Gimli is a much more dignified, well-respected character in the book, although some of his funny moments in the films came from the books (such as his Orc-slaying competition with Legolas, though even that one was altered to his detriment). There's no suggestion Legolas is stronger than Aragorn or Gimli. It is confirms that they heightened this role to accommodate Merry and Pippin's coming of age, Dwarves being crude and all.
Also Merry and Pippin were less of a comic relief in the book. Pippin wasn't stupid so much as he had a tendency to be thoughtless and overly curious. Merry he was a more serious character, he's still more serious in the film, but he is also more carefree and comical.
On the other hand, Aragorn is more unsure about returning to the throne of Gondor, and must be convinced by Elrond to do so.
Frodo is much more of a push-over compared to his book counterpart.