Honestly, as amazing as he is, I've been really impressed with how the number of amazing narrators has exploded in recent years, mainly due to youtube.
This dude is early in his career and he's already this good. His voice isn't even anything that special, he just puts a lot of effort into good delivery.
The likes of Attenborough and Morgan Freeman opened the door, but shitloads of people have walked through it. I have so much bedtime documentary content, it's amazing.