The Alchemist-Archetype is actually pretty great - optimize it for reach (you just need it for touch-attacks, so some sorcerer bloodlines work well, though there's also other means) and you essentially got swift-action healing for anyone in a good radius. One that can even be used to deliver buffs.
Paladins get one really great Mercy that grants fast-healing. Druids get to worship a deity and take one it's domains. (And also get utterly broken free potion crafting).
But overall, you're right - most of the stuff just doesn't address the main problem with healing, that which attempts to do so does so poorly, and generally most of the stuff is underwhelming.