Greatest Progressive band of all time.
 

The band can be of any genre where it is described as progressive.

I'll have to go with the Flower Kings. They are like a combination of Pink Floyd and Genesis.

I'll go for Gentle Giant. I think "Octopus" was the best prog album ever.

And please don't let this thread end up like the Buckethead/Hendrix one!

I preferred In a Glass House.

I'll be the lame-o who nominates Yes. The culmination of their progressive output, Yessongs, is absolute ecstasy in musical form

i'm not the biggest prog fan.....and honestly never really liked much until coming here and getting some great comps from various members.....but i think i'd say my favorite is Fish era Marillion

I'm not that into prog myself, to be honest. I think a lot of it is overhyped, pretentious and boring. I honestly can't stand stuff like The Mars Volta. On the other hand, there are many very talented and innovative artists in this genre. I wouldn't mind getting some comps if they are still around.

My vote goes to Rush. Although they were not part of the original prog scene, and some may argue that their later work is not fully progressive, all their albums are laced with clear progressive tenancies, and they are without a doubt the most prolific progressive rock band, consistently putting out strong albums every few years since 1974. Plus, they arguably bigger now than they have ever been. Looking forward to their new release in 2012!

My top 3 would be:

• Rush
• Yes
• Jethro Tull (although Ian Anderson never intended JT to be a progressive rock band-- their string of 70's albums are certainly progressive and almost flawless)

Although I didn't rank Yes as my #1, I certainly agree that Yessongs is-- as you put it "complete ecstasy."

Rush
 

I personally consider the band Rush as a template, in easier terms, especially considering the influence Rush had in helping to establish progressive rock musically into perfection. Their timing signatures serve as templates when considering the evolution of progressive rock.

:clap: one of the great live albums.