I ask the question because I've always seen him typed as an ESTP, and so, I thought he was. But I've also seen him typed as INTJ a few times, I've read a part of his biography, and what I read did'nt resonate ESTP at all. He is and has always been a reclusive, a loner, withdrawing, very shy and awkward at the point that even as an adult he has difficulties to watch people in face. He seems very independant and introspective, work carefully on his long-term project and is a perfectionist. He hardly tolerate when things don't go in his own way and is a control freak. Plus, he was relatively sober, and an hard-worker. Use your illusion is a typycal Ni monster.
ESTP seems to be more his on stage personality, I could see an ESTP act like this if he has shyness, paranoia and some others neurotic issues, I could also see an ESTP be like this if he's submit to a an oppressive inferior Ni and become severly paranoid. But it's just a possiblity. Billy Idol and Nikki Sixx are ESTP for sure, Axl Rose, not sure. INTJ could fit better, tons of things he did was so anti-rock'n roll, he is the anti-Elvis to me in some sort (Elvis was ESFP).