Robert Downey Jr is the obvious case of a person who had a redemption arc, to simplify it he was a promising actor that got addicted to drugs, fell off, went to rehab and then became a huge hollywood big stsr known, even known for being Iron Man.
What real life person had a redemption arc?
Gary Barlow.
Talented but obnoxious, arrogant boy band leader bombed his initial solo career, ridiculed by Robbie Williams’, reaches rock bottom, eats a ton of humble pie,comes back as professional man band leader, solo artist and dad.