The Sun Priest

From publisher blurb:

Sunpriests are the servants of Ayash, the Shining Healer, the Radiant Shield. She blesses you with her grace and power, giving you the ability to heal and protect others, and the strength to confront and banish the forces of darkness.

The sunpriest is conceptually similar to the cleric, except you must worship and serve a sun deity (if you don't want to use Ayash, you can easily swap her out with one of your own), their spellcasting resource is harder to replenish (but you get more of it), and their own unique moveset is themed around the sun and its light.