What are the most natural looking dental crowns in 2018?

Hello. I'm doing a research on the topic regarding crowns and veneers. So far, I realized that there is so many options, from metal, ceramic to zirkonium. Moreover, there is few ways of making these too, plus the experience and skill of doctor and technician is important factor. My questions is this: What are the best dental crowns and veneers that can be done in 2018, regarding these 3 factors: most natural look, durability (especially in terms of staying clean and fresh) and biocompatibility?