The first four films (Dr. No, From Russia with Love, Goldfinger and Thunderball) are all reasonably close to the novels, except for substituting SPECTRE for SMERSH. The series became more comic book after that.
The novels also weren’t very comic from what I’ve heard. The jokey tone of the films came not from Fleming but from ‘North by Northwest’. Cary Grant was offered the role of Bond as Hitchcock was offered the direction of Dr No. Both declined.