A fork of Rural Dictionary
Someone who does a great job yet receives little or no recognition for that. an unsung hero usually refrains from claiming too much in return for his/her efforts.
"Mikel Arteta was considered to be Arsenal FC's unsung hero this season."
An unsung hero is a person who commits an extraordinary act but does not receive recognition or proper respect. However, as the late George Carlin put it, "As soon as someone is identified as an unsung hero, they no longer are."
Pizza delivery people are the unsung heroes of the 21st century
usually in a movie, the unsung hero has major importance in the story by doing something major, but then is brushed off as a side character.
an example would be Hobie Brown in across the spider verse or the hacker in the isle of dogs (these are both the unsung hero of the movie )