Narduar is my favorite example of a master interviewer. Watch him leave Pharrell speechless multiple times (starting around the 5:15 mark is a good example). This guy does his homework better than anyone.
* https://www.youtube.com/watch?v=rMyvB2wAXYI
And A$AP Rocky
* https://www.youtube.com/watch?v=p8IYpVF_S5M
He also seems to be able to 'find' people just before they really make it big/mainstream, like Kendrick Lamer, Billie Eilish, and Tyler the Creator. I heard about them from Narduar before anywhere else.
At the very least in terms of doing proper research on a subject, I think there's no one better.