Lanefan
Victoria Rules
If you're willing to make Warlocks and-or Sorcerers divine rather than arcane, sure; but I'm not sure that'll fly.If we're going to get into the "rebuild the class list around the most popular tropes" game, then Cleric is the class that really needs to be chopped up, and have its concepts spread among Paladins, Druids, and some combination of Warlocks and Sorcerers.
The hard-line division in magic between arcane and divine (i.e. studied or spontaneous vs divinely granted) isn't something I'd ever want to lose; and IMO the only way for someone to be able to do both at once has to be via the multi-class route.