He comes off as very INFP in this video:
BLAST: Interview with Pharrell Williams | Hypebeast
Lots of focus on, "What does that feel like?" "How does that affect you?" "What emotional sensations does this create for people?"
He repeats that his most important value is to express himself in every way he can and hope that it will affect others in a powerful way. Sounds awfully Fi.
I could go with ISFP too, I guess, if he just had really powerful Ni, but my impression is very INFP.
The quoted lines are remarkably similar to stuff that's come out of Brian Eno's mouth.
Regardless of the fact that Williams is letting people make up their own decisions about his project, the compulsive nature of the questions he'd like to ask leads me to think he's in no less of a position than of complete control, like a vulture red-eying some carrion. Tell me tit-for-tat how you feel about this before I rip one of your eyeballs out.
and Eno.
"For the world to be interesting, you have to be manipulating it all the time."
"If you want to
make someone feel emotion, you have to
make them let go. Listening to something is an act of surrender."
Look at how word "make" is applied in this context. It's a direct/hard action verb, one which I'd suggest infps would be among the least likely of the types to use in circumstances such as because their focus is on maintaining harmony, aka their own feelings, or state of mind. (another example: "shut the light off" or "turn the light off").
Williams, like other infjs in print/elsewhere, has a tendency to repeat key words, whether formality-related or otherwise (in the video's case, he uses the word "war" 5 times in the span of 30 seconds). An infp would be far less inclined to verbalize just to fill up space. In comparison, Williams does. estjs love the shit out of people who keep busy, don't they?
So without wasting anymore energy, I think both are much too systematic/cerebral and controlling (in a behind the scenes/nfj way) not to be infj.