Yes Related and prog one-off bands or supergroups

[Soundwaveseeker]

Yes related bands who only made one album, or even other prog band one-offs or ad-hoc supergroups. Some only got to make one album, others may have only had plans to do one. The obvious ones:

ABWH - Yes without squire pretty much. Only got to do one before they morphed back into Yes Official.
GTR - Howe with ex-Genesis guitarist Steve Hackett. Just the one before imploding. Probably the highest profile hit single/corporate aor type project Hackett had ever done. Downes as producer.
EMERSON LAKE & POWEL/3 - To The Power Of 3 - ELP minus an P and an L respectively. One each, which was a shame. I absolutely love the '3' album.
STEVE HOWE'S REMEDY - fun and quirky, though he never went further with the Remedy moniker. forming the Trio instead.
BANKSTATEMENT/STRICTLY INC. - Tony Banks of Genesis tries his hand at his own Mike & Mechanics-type sophisti-pop ensembles, but sales were meh. Strictly Inc is a duo with Jack Hues(Wang Chung) and is an excellent, near-Genesis album. Closes with a 17-minute epic and features Daryl Stuermer.
QUIET SUN - Roxy Music's Phil Manzanera with fusion/Canterbury-style one-off. Very Soft Machine.
THE KEY - Billy Sherwood with more rock-styled group had one album The World Is Watching.
LODGIC - another Sherwood band, an earlier Toto-like group had only one album.
YOSO - and speaking of Toto...

more recent ones include:
ARC OF LIFE - so far one album, but doing another would bring them out of this bracket.
MARK KELLY'S MARATHON - Marillion keyboardist's side-band which is in the Frost*/John Mitchell era It Bites kinda ballpark. Came out in 2020.
ARW - well, can't include them because, well.... But hey, they did put out a live album. But no studio album, so they don't count.

I won't list everything I can think of, I'd be typing all morning. What are some of your favorite Yes-related or just prog one-offs or bands that only got to make one album or only have one album so far?

[ragtime]

FIELDS was a one-off recording group (1971) formed by Graham Field (keys ex Rare Bird), Andy McCulloch (drums ex King Crimson, went on to form Greenslade), and Alan Barry (bass & vocals, played with the Giles Brothers who later joined King Crimson). Their self-titled album is worth checking out.

[Yorkshire Square]

Strictly Inc is a bloody good album - Banks' best work outside Genesis in my opinion.

I also have a soft spot for Emerson Lake & Powell. I remember buying this when it first came out in the mid-eighties, what an album. It's hard to swallow that all three of them are dead now.

[soundchaser09]

SQUACKETT- great collab with Squire and Hackett, still enjoy it every so often- their voices worked well together I thought. The album A Life within a Day is very Hackett in style but with those booming bass notes great stuff!

[Old Frothingslosh]

I loved the EMERSON LAKE & POWELL album, although the mix is a bit weird. I saw this tour and Powell just gave them such power and punch live. Shame they couldn't get that second album done. 3 didn't do much for me and the reunion with Palmer of Black Moon and In The Hot Seat are hit or miss. I'll take the Powell album over any of those.

another Yes related not mentioned yet was the 1st UK album with Bruford. Really good stuff on that one!

[Soundwaveseeker]

Emerson lake & Powell was an excellent album, and I saw this tour too. The ending of Learning To Fly segueing into Pirates was a treat. The album's production was a bit 'tinny', but I think the album was closer in spirit to what ELP were about pre-Works or even what they were doing in the 90's. I love the 3 album, but I'd have taken a second ELPowell album instead if that was possible. Black Moon was mostly hit and Hot Seat was mostly miss.

Squackett! Can't believe I didn't mention that one. Closer to a Hackett album than Squire in its instrumentation, a lot of that would be down to Roge King. I believe they would have done another album at some point.

Here's one I forgot:
WHITE - Alan White's band, Downes on keys, great white and wintery Dean album cover. Singer reminds me of John Palumbo of Crack The Sky(American prog/classic rock band), with more gritty/gravely vocals. In the melodic rock Asia/3/Arc Of Life vein. Good rock album to listen to in the summer.

[downbyariver]

BANKSTATEMENT/STRICTLY INC. - Tony Banks of Genesis tries his hand at his own Mike & Mechanics-type sophisti-pop ensembles, but sales were meh. Strictly Inc is a duo with Jack Hues(Wang Chung) and is an excellent, near-Genesis album. Closes with a 17-minute epic and features Daryl Stuermer.
[...]
THE KEY - Billy Sherwood with more rock-styled group had one album The World Is Watching.

I was not aware of or had forgotten about those. I really like "Walls of Sound" from Strictly Inc., and "Lonely as the Rising Sun" from The Key in the early going. The Key starts out like it's going to be Billy Sherwood doing a really hard rock album, but it seems like we start getting more typical Sherwood sounds as the album goes on. Strictly Inc. seems to have a late Genesis meets 80s Steve Winwood vibe (In a good way).

[Soundwaveseeker]

Strictly Inc. seems to be one of the least known solo projects from a Genesis member. I think they shot themselves in the foot by calling it such an anonymous name instead of Tony Banks/Jack Hues. They were going for a project/band name identity like Mike & The Mechanics, but that didn't work for him the first time with Bankstatement from 1989. It sank without a trace and didn't even have a US release at the time, yet it may be the best Tony Banks solo project - save for A Curious Feeling and maybe The Fugitive. Jack Hues sounds great on it, and if you think about it, there's some Wang Chung stuff that kinda reminds me of Banks solo or pop Genesis. Just a slight vibe, not a large one. But kinda. It's always great to revisit these things.

[carlmarx38]

Anderson-Ponty Band......I know many will disagree with me, but IMHO much better than "1000 Hands"