Maybe a musician who isnt legendarily well known, who didnt have a stratospheric rise from the start. Somebody like Greg Gonzales from Cigarettes After Sex, who recorded his debut in like 2010 or something and put it on bandcamp, and barely anyone even listened to it. Then a fan put it on youtube years later, and it suddenly went viral. Gonzales was playing in cover bands in dive bars for barely any money at the time, and when a flood of people started buying his record and the views on youtube were racking up, he said he started crying, he thought no one cared. Now at age 40 hes touring the world and while his band arent pop megastars, they are doing quite well for themselves. A lot of the music biopics are about big acts with skyrocket trajectories, so maybe Id like to see a story about a quieter triumph.