Tom Waits.

Perhaps a less well-known name but he's been around forever in both film and music. He has famously never allowed any of his music to be used for marketing, ever. He also successfully sued a company that couldn't license his music and instead produced a sound-alike artist mimicking one of his songs for a commercial. He seems generally good natured, and he has spent an intense amount of energy making sure his family's privacy is respected. He's even been arrested for fighting plainclothes cops who were harassing someone, and he sued the city of LA in civil court for false arrest and won.

Sure, his persona is more persona than reality, but it's a persona that has served him well as an outsider that reveled in being an outsider. He speaks for us dregs of society who spend all night drinking coffee in all night diners, writing poetry and smoking cigarettes. The godfather of alternative rock, who holds a place for many in the younger generations that was held by Bob Dylan for the elder generations.