He has used the CE1 for all he's career for main chorus sound. I think he used also the CE2 but can't find nothing. This photo is from the Californication's recording sessions, but this pedal can be seen in every live video and pedalboard pic.

Tame Impala played Jimmy Fallon on 8-12-2011 performing the song "Why Won't You Make Up Your Mind". At 3:14 you can see a vintage Boss CE-1 in the upper left corner https://www.youtube.com/watch?v=BRVdCQ2wu4Y You can also see the Boss CE-1 in the upper left corner of this photo http://images.equipboard.com/uploads/source/image/7381/big_tame.jpg?v=1417628443

Alex Turner is seen using the Boss CE-1 Chorus Ensemble Pedal in his pedalboard during the Humbug tour. This Boss pedal has been used since their 2009 - 2010 Humbug tour, no evidence of it being used after this era.

According to the lot notes from Bonhams auction house website, Eric Clapton used the Ibanez HD1000 Harmonics/Delay, a DBX 160 compressor, a model SDE-3000 Roland delay, a Dyno-My-Piano Tri Stereo Chorus, a Boss CE-1 chorus, and a Boss HM-2 Heavy Metal pedal for his Bob Bradshaw rack system in the mid to late 1980s.

Used on The Great Southern Treadkill, as stated in this June 1996 Guitar World interview.

You've got a huge pile of effects boxes in the studio. Aside from the ones you've already mentioned, what other units did you use?

I hooked up my MXR Flanger/Doubler every once in a while and I used an E-Bow for a real smooth, continual sustain on "10's." I also used one of those little Korg Pandora boxes for a weird, fluttering sound on a short passage in "10's" and a Lexicon Vortex for the shimmering, breathy tone on my theme-like lead in "The Underground in America."

I also used a Roland AP-2 Phase II pedal, a KorgAX30G, a Digitech Whammy pedal, of course!, a Boss CE1 Chorus and a bunch of old Electro-Harmonix shit -- a Small Stone Phaser, an Electric Mistress Flanger/Filter Matrix, a Little Big Muff and a Soul Preacher Compressor/Sustainer. I also used a Korg G1 on the demos and some of that made it on the record. If l can't beat a part of the demo we'II just extract that small section and use it. The G1 is a bad-sounding little unit, man.

There's some wah on the record, too.

Shit, I almost forgot about that! I used my Vox Wah on the earlier part of the recording and then Jimmy Dunlop sent me one of his rack-mount units [Crybaby DCR-1SR]. Man, that thing is incredible, you can literally get whatever you want out of it. I also really like the idea that you can run a bunch of Wah pedals all over the place on stage with it so you're not always tied to that one spot. The only uncool thing about it is that Rex [Brown, bassist] will be dicking me off every night 'cause he'll be jumping on my pedals all the time!

Appears on the equipment list used to make Syro.

BRIAN MAY's 1982 SYSTEM

The second stage system that I designed and built for Brian May during the Queen years was, from the Guitar:

Pete Cornish Line Driver (on Guitar strap): 100ft special cable with power for Line Driver Pete Cornish Treble Boost Pete Cornish Treble Boost #2 with bypass switch Foxx Phaser with bypass switch Pete Cornish Line Driver and Hum Loop Buster to Clean Amps (3 X AC30 - Normal Channel) Foxx output also to MXR DDL II (#1) then 3 X Delay #1 Amps via Line Driver and Hum Loop Buster Foxx also to MXR DDL II (#2) then 3 X Delay #2 Amps via Line Driver and Hum Loop Buster Foxx also to Roland CE-1 (seriously modified by Pete Cornish) then 3X Chorus Amps.

The above all built in two units - a pedalboard on stage and a large rack unit off stage (behind the AC30s) as was pictured in the August 1986 copy of Guitarist (USA) - check it out.

N.B. Brian May always used the volume control on his guitar to reduce the drive into the Treble Boost for quiet numbers and the second Treble Boost was used for solo boosts. Oh - and the “Cry Baby” in his pedal board is the “Foxx Phaser” speed control. The other pedal is for controlling the Eventide Harmoniser (part of the P.A.) for certain solos.

Listed among Satriani's gear in the April 1989 Musician interview "The Devil And Joe Satriani" by Ted Drozdowski.

SATCH'S BOOTY

WITH HIS band, Joe Satriani plays custom Ibanez guitars with DiMarzio pickups and D'Addario strings. His amplifiers are Marshalls, usually a pair of 100-watt heads driving two 4x12 cabinets. "The amps are run clean. I've got a compressor in-line but I don't really use it. I use an Ibanez digital reverb, some Ibanez digital delay, a Cry Baby, different distortion pedals and a Boss CE-1 chorus, the rack I have is really filled with a lot of back-up stuff: an extra chorus, a Randall amp/pre-amp that I can use if my pedals don't work, a t.c. electronic delay. It's really low-tech, inexpensive, cheap, simple."

With Jagger, Satriani plays a Strat: actually a hybrid of Fender, Tokai, DiMarzio and Ibanez parts with a 1954 Fender neck courtesy of Joe's guitar tech, Pierre de Beauport of New York City. His main amp's a Marshall, but there's a Roland JC-120 with a Boss delay tucked away for 'Midnight'. He also uses a t.c. 2290. "It's got all sorts of loops that allow you to program whole sections. So Pierre, who has a script, can just punch me in and out of these little patches so I can get louder or softer, or there'd be some delay. I wanted to keep the stage as clean as possible."

When he's writing, Satriani uses a four-track Tascam Porta-studio. "I've got some Rockman gear and an array of cheap pedals at home. That's about it. Plus a lot of basses, synthesizers, guitars and cassettes lying around."

In this guitar player magazine from 1980, Geddy mentions a Boss chorus. Judging by the fact that Alex used a Ce-1, it's probably one of those.

"No. I don't use any effects on my bass, except for a Boss Chorus on perhaps one song in the course of a concert. "

According to this website he currently uses the Boss CE-1 Chorus Ensemble Pedal on the Getaway tour.

Featured in this May 5, 2019 interview on the website for Stompbox: 100 Pedals of the World’s Greatest Guitarists.

Also on hand is a bevy of modulation options. “I used chorus all over the place with Failure and A Perfect Circle,” Van Leeuwen admits. “I went away from it in Queens, but it’s come back there, and on some Sweethead stuff." (...) “This is the classic Boss Chorus Ensemble – yes, I’ve been told it’s one that has the ‘good chip,’” Van Leeuwen says. “It’s basically the ‘80s in a box. It’s really lush, what it does – especially running it in stereo.”

At 1:49, you can see the Boss CE-1 on the top of his pedal board