Wood glue versus epoxy for doweling stripped screw holes
Wood glue, hands down. Wood glue is designed to penetrate the wood for a tighter bond. Properly done, wood glue is stronger than the surrounding wood. I have chairs I've wood glued and clamped and they're still fine years later.

Epoxy is OK, but you have to make sure you get the right epoxy too. Many are exothermic (they get hot) and might eat your wood. Just be sure to read labels for supported materials.