Nowadays, if a production doesn't break all of the records, most casual cinephiles will deem that project as less of a success than whatever Disney, Marvel or Star Wars movie has recently dominated the box office.
Yet, genuine success should always be measured in how much profit or buzz a film has managed to conjure up based on what its original budget was.
Joker definitely didn't come close to surpassing Avengers: Endgame's record breaking haul. But, in earning over $1 billion at the box office on a relatively small $55 million budget, it became a gigantic success in terms of its sheer profitability.
However, some films weren't fortunate enough to find themselves with a high level of press/social media exposure or even a budget over $1 million. Nevertheless, they still went on to become massive financial and/or critical successes, despite never being lauded quite as much as the aforementioned box office juggernauts.
You've probably heard of/seen some of these flicks or perhaps you didn't even know they existed, either way you would be forgiven for not realising that these ten features were some of the most prosperous films ever made.