Feeling/Intuition Introvert. INFJ. Certainty 4/5.
In the following interview (And others), he is extremely concerned with passing judgment based on his emotional value system, thus implying Feeling Primary. He displays signs of Intuition as well, implying that as Support.
YouTube - Thom Yorke interview about the new album "Eraser"
Compare Yorke with a musician I believe is INFP, Elliott Smith (Certainty 9/10). Smith seems to be more of a Perceiver in my view.
YouTube - Elliott Smith - Interview Clips