I don't know what to think of the whole thing ... but I kinda have this idea that this is the result of the whole thing being relied on and dependent on 5 bands (so to speak), and in the end, what you find is that the bands that do not have the same "instruments" (or worse ... the sound) as the named top big bands in Progressive Music ... and it makes a lot of people forget/dump some of the things that were incredible that helped the music we love get here!

This is why I never forget the history of it ... and sometimes I think that we need more Admin support in this area ... and also one of the reasons why I did not like that "the instruments of pork" book ... it was an insult to so many bands and their creativity ... that in the end, made "Progressive Music" look more like a cartoon, than it did real music! There are/were many folks that had even further out and better instruments, that such a book will not report, because it's not this or that ... from the top five! Heck ... what the fudge will Jaco need an effect or a blue funky looking guitar for? Take that you "progressive" ... idiolist! 

Again, compared to all of Europe, many of the English bands were not exactly the best ... there were many bands bringing out a lot of great music ... that no one, even here, will even listen to ... however, today, there are more listens to different bands from various places, with only one concern ... the cookie copies are ... a bummer ... it's like their own culture and ability is not worth anything ... just to do a bunch of "metal songs" ... is actually weird for me! 

LOL!!  I saw WR on April 10, 1977 with Al Dimeola opening (Land of the Midnight Sun tour).  Al put out enough guitar licks for two bands!! 

WR were sublime...Jaco, Zaiwanul etc.  Proof that you don't need guitar to be prog!  

...  ...  ... mannnnnn ... you know that's prehistoric stuff ... and most folks were not there to have a good idea! And listening to that old stuff ... where's the lyrics man?  ... 

Interesting band!  I used to listen it, and it's a weird example of ELP influenced band without keyboard at all :-) Guitar-synthesizer and MIDI pedals are responsible for creating all "synth-sounding" leads and textures on 1st two albums. long track "Brainstorm" is kind of a nod to Tarkus .

on later album Angels Of The Apocalypse they employed real keyboardist - no less than Jens Johansson

another obscure band is Symphonic Slam from Canada. their guitarist used a lot of guitar synthesizer, although there was also keyboard player   

I think it was mainly just the prog metal bands imitating Dream Theater. An interesting thing is that the band Mastermind released their first two albums before Images and Words and yet their sound was similiar(in the sense that it was heavy and almost metallish at times and also prog)but was more influenced by ELP. They did have guitar but often the guitar synthesizer(I think it was)sounded like keyboards. An overlooked band these days worth looking into. Ars Nova were another ELP influenced band from the 90's but I'm not as familiar with them. Anyway, there was plenty of non DT clones and even non neo prog stuff from back then you just have to dig for it. 

I made short Hammond organ solos in prog compilation (only modern bands)

featuring Standarte, The Flower Kings, Beardfish, Transatlantic and Jordan Rudess solo.

all mentioned are worth to check in the context of keyboard-driven prog

Moshkito: You said,

"it makes no difference if a guitar is there or not ... there are many "lead guitarists" that know how to "underplay" their instrument in favor of the music ... and as such, to me, that's just like a band with no guitar ..."

I agree with you, and that's why I said in my original post that I was looking for bands with no guitar, or where the guitar is in the background. I mentioned Genesis as an example.

To me the larger issue is not "guitars are bad" . . . the larger issue is, I'm trying to imagine an alternate reality, where 90s prog revival bands imitated the diverse and unique instrumentation of 'golden era' prog bands, instead of everyone imitating dream theater.

(There, I said it) 

Anyway, learning about modern-age bands with diverse instrumentation helps me picture what might have been, had the 90s gone differently.

I know I made a suggestion and went looking at my collection and could easily name many more ... but I lost my taste for it half way through it ... the reason being that to my mind (it's a never ending movie!), it makes no difference if a guitar is there or not ... there are many "lead guitarists" that know how to "underplay" their instrument in favor of the music ... and as such, to me, that's just like a band with no guitar ... 

However, of all "new instruments" in the 20th century, the electric guitar is likely to be considered the most important instrument of all, as a lot of music has shown ... as it is capable of "carrying" the music, something that previously we thought only an orchestra could do ... and so on. 

A great example of this, is if you listen to EOS by Terje Rypdal ... with David Darling (skip the first cut ... !!!), and when you hear it, it's like the prettiest chamber music ever created ... with an electric guitar and a cello with some small electronics. And the result is ... you don't think of it as an "electric guitar", but as an instrument helping to carry a specific feeling about the music that was created ... and it is spectacular, and to me is Jimi Hendrix ... a natural extension of where he could take his experiments, instead of playing the same rock music again and again, until he is dead and bored!

It's similar with Mike Oldfield, for example ... since he will over lay many guitars and all of them are doing different things, and to think that this one is the lead is kinda strange sometimes ... it kinda is thought to be the lead because it is the loudest, but a minute later something else is. Or Vangelis ... he doesn't use any guitars either ... well, he does use spoons, but you are NEVER EVER going to look for them ... because you are looking for a guitar (not you tokyog) ... that makes the music "progressive" ... it is not the guitar that makes it so ... or one third of all "progressive" and "experimental" folks out of Europe are just a bunch of idiots ... well, some Americans too ... how about the stickmen? and some of their side projects ... you don't need a guitar ... but "conventional" tastes (and that _______) definition of the music says it must have a guitar ... and a bass, and a keyboard and ... some other stuff that you want to dump in the bathroom!