I like the Muppet idea. Only concern would be, for how much longer will they be relevant? They have a strong fan base and don't seem to be dropping completely off anytime soon. But again, for how long? Aerosmith has run its course. There are still fans no doubt, but it needs to go for many reasons, most obviously the recent Tyler controversy.
What about the fictitious band played by The Dillards known as "The Darlins' who appeared on the Andy Griffith show for a couple episodes? A wholesome, non-controversial group from a family-friendly TV show known globally.