The one that starts the silliness. This starts with a funeral for a “JB”, Bond sucker-punches the widow (which turns out to be the dead man) and eventually ends with Bond escaping on a jetpack.
The one with Pussy Galore, Oddjob and the titular Goldfinger attempting to blow a nuke on Fort Knox to irradiate the gold and make all other gold more valuable.
The quintessential James Bond. The one with all the recognisable elements: