You're gonna say I'm a millennial for this list 😅 but here goes :
Lord of the rings trilogy
Django unchained ( I'm a big Tarantino fan 😆 )
Midnight in Paris
Scott pilgrim vs the world...
I think 4 finished scripts is enough to start contacting agents. The only thing that could stop you from doing so is the quality of your scripts. If you are self aware enough that your scripts are good, or have received some positive feedback (from professionals) on them, then do it. You don't...