Well we are all just guessing on these types, but they seem to sing a whole lot about science for a couple of NF's.
I'm still pretty sure that Flansburgh is an ENTP.
They sing about science in that "isn't-it-cute-and-wonderful-that-we're-teaching-kids-with-our-lyrics?" kind of way. Flans is ridiculously F, I'd say, but at least we can agree he's certainly an Ne dominant.
Off the top of my head...
Frank Zappa - INTP
Cedric Bixler-Zavala - INTP
Isaac Brock - INTP
Robert Fripp - INTP
Syd Barrett - INTX
Maynard James Keenan - INTX
Gord Downie - INTJ
Zach de la Rocha - INTJ
Tom Morello - INTJ
Omar Rodriguez-Lopez - INTJ
Steve Vai - ENTP
Neil Peart - ENTP
Weird Al - ENTP
I read somewhere that Cedric and Omar are both INFJs. I still tend to think INTJ more for Omar, but after considering it, INFJ makes a lot of sense for Cedric.
MJK I used to type as INTJ but now am pretty certain he's INTP. He's way too self-absorbed and obsessed with proving his own brilliance for the goal-oriented INTJ.
Neil Peart gives me an awfully INFP vibe, but I haven't read/watched his personality all that much, so maybe not.
The only one on your list that really gives me pause is Zach de la Rocha. Have you listened to him speak? He's constantly focused on his moral crusades and educating the public about his important causes and so on. I agree on the N and J, but I get a hardcore NFJ vibe from him, probably ENFJ. He's a little angrier than most, but it's there.
From Graffin's stage performance and lyrics, I'd guess INTJ. His lyrics aren't typically as creative as their other primary songwriter's (Mr. Brett), but they're definitely opinionated and usually more.. well, direct. He's also got a doctorate in zoology and teaches at UCLA.
INTJ is probably a good guess for Graffin, but I think INTP is equally likely. He has a pretty apparent Ne penchant for concocting borderline-pedantic wordings and phrases just for their own aesthetic value (INxJs usually don't have
time to play this game), and his metaphors and lyrical tricks don't seem as bizarre and seemingly unrelated as those of most Ni dominant lyricists do. This is all speculative, of course, but he sounds pretty Ne+Ti in his mission to turn the world against God! (Bear in mind this is coming from a big BR fan.)
From what I've seen, Ne tends to use metaphors that, if you're clever, you can connect the dots and discern the meaning, because it's based in externalized patterns that are out there just waiting for anyone who notices them to figure it out. Ne desires to be understood and appreciated by others. Ni dominant lyricists, on the other hand, because they don't give a shit if the symbolic connections they've discovered internally make sense to anyone other than themselves, often seem totally out of left field and too vague to really discern specific meaning from--it's all about the symbolism; they'd much rather offer a vague analogy that summarizes the general feeling/thought process that inspired the song than actually make sure to use lyrics that other people can piece together (see Thom Yorke of Radiohead--big time INFJ.)
Ne wants people to guess the particular meaning from the clues provided; Ni just wants to get the message of that song out in whatever form is most internally therapeutic--externalized meaning be damned. Graffin's lyrics are typically very pointedly about particular topics, though he still makes you read between the lines a little to pick it up. (Also, I think Graffin's lyrics are usually more interesting than Gurewitz's...what songs convince you otherwise, out of curiosity?)
I work with an INFJ guitarist/songwriter who always puts the wackiest, most irrelevant titles on his songs, with no apparent relation to the lyrics or song topic (if the topic can even be discerned without explicit explanation from the writer) whatsoever. It's obvious to him, of course, how they symbolize what he wanted, but Ni doesn't care if anyone else can follow or understand the train of connections.
How about Gurewitz, though? xNTP sound right?
