Rock star, easily.
Great money, great lifestyle, you can let yourself go and still get plenty of pussy. You can change it up and keep releasing material even when your old.
I'll play this game and agree Rock star. You can also tour and make plenty of money on stuff you made as much as 50 years ago, look at the Rolling Stones or Who playing their stuff from the 60s, and Billy Joel selling out arenas on material he developed in the 70s and 80s. You can release new stuff as well, let yourself go when you're not touring, and tour when you want to. You can constantly make money through Itunes or whatever on the old material, I'm sure David Lee Roth and Van Halen make a lot of money without having to spend any time together.
Also, you don't "age out" of roles like a pron star and film star does. You can get all the action of a pron star and not be in front of a camera, like Gene Simmons, and people will pay to see even someone like Ozzy or Brian Wilson mumble words (another benefit, you can just lipsync anyway when playing an arena or stadium people won't even notice).
As far as film star, Bruce Dern and Joachin Phoenix certainly don't play the roles they did when they were younger, and someone like Daniel Craig complains about all the stunts when playing 007. You can also get pigeon holed and identified as a "child actor" or "007" or "Luke Skywalker" and not get different roles because of it. Woman especially tend to drop off roles at 35, 40, I'm sure it affects male actors also. People pay good money to see really old guys play the music from their youth if you're a very successful musician.