Imagine that these bands in each poll option could have got together to produce an album, and imagine that each band's members could come from any period and collaborate despite being of different times/eras.  So, for instance, if you wanted you could take the line-up of King Crimson in 1973's Larks' Tongues in Aspic and have it collaborate with the IQ of 2014 (time of Road of Bones methinks based on memory).  If no pairing here is really intriguing or seems at all good, feel free to vote for the one that seems least abominable.  Just none of the "none" type comments, please.  At least try to be more creative in response than that.  Some of these pairings would make more sense in terms of possibly fruitful fits than others, I would say.  And feel free to mention other pairings provided that you try to comment on and vote for any of the listed choices.  Please try to limit any negativity.  I know it can be very apples and oranges, or even bananas and motorcycles (or just plain bananas), and pretty weird, but then I am a pretty strange animal if it was not already obvious. No multiple votes this time.

I think that UK and Henry Cow could have come up with something really interesting had the band members worked together in the late 70s.

Good call.  Agreed. 

Nice listing ... and it had my imagination running wild!

The one I thought about was Edgar Froese in his book, talking about David Bowie, when he realized that David was not as open to free form and feel, as it was originally thought, and at that point he apologized to David and said that the styles and music was too different to make it work. It's the longest chapter in Edgar's book, but it really says a lot more about his talent and how it works than David, who often "had to find his voice" in his lyrics per the producer quote in the book. I don't think that Edgar, through his years, ever really wondered about a wrong "note" even though his constant looks at the members sometimes suggest otherwise, but I think those were more cues than anything else.

Now if I could design a parallel world with one such collaboration in it, I'd have Peter Gabriel singing for Can. Even if I'd somehow have to integrate Genesis' other members, it may be worth it. 

Ah,m I can scarecly believe I forgot to do a Can collab.  I'd like Can meets black midi.

Faust 1973 meets Coil 2005 would be a dream come true for me (musically not that odd of a pairing, but temporally unlikely)

Saga and Tangerine Dream aren't much unlikely, IMO.

One unlikely is Genesis lead by Phil Collins with the late Stormy Six 

The only ones I could comment on with any authority would be DT/ VDGG, Frost/ GG, IQ/ KC & Saga/ TD and I'm honestly not sure I'd want to hear an amalgam of any of them tbh...