Try a first light tour to conquer the crowds, watch pale spill over the caldera
https://medium.com/@idrosehgcw/top-santorini-island-tours-from-caldera-views-to-winery-tastings-and-hidden-villages-f1e1713023fb
Try a daybreak tour to conquer the crowds, watch light spill over the caldera, and catch serene streets earlier the island wakes up.