I've read everything in his Cosmere Universe and some other stuff besides. I actually just read Elantris (finally) last weekend. It was incredible.
I would disagree however. I think he's INFJ. He's definitely an Ni dom. Some stuff about his personal life, and the way he approaches things is more Fe than Te. His values are more universal ethical -human dignity and the like. He's also a Mormon. His complex systems also seem more Ti. I've tried to come up with similar things, but discard them before they're too developed in favor of more efficiency. He also really likes to write xNTP characters, especially ENTPs, more than I think an INTJ would. INFJs are known to get along well with and favor xNTPs for romantic relationships.