The Roland RE-501 Chorus Echo can be identified on a stack behind John Frusciante in the image provided.

In this photo of Kevin's makeshift studio from the InnerSpeaker recording sessions, a Roland RE-501 Chorus Echo can be seen on the desk.

In a photograph from Polymathperspective, Damon Albarn is shown with a Roland RE-501 Chorus Echo on his shelf, indicating its presence in his studio setup.

Above & Beyond have incorporated the Roland RE-501 Chorus Echo into their setup, as showcased in their Instagram post captioned, "What plugins should look like."

In the photo "Studio A.." the RE-501 Chorus Echo is shown on top of the middle rackmount in Justin Vernon's (Bon Iver) studio April Base

In the source image, Nils Frahm's Roland RE-501 Chorus Echo is visible atop a Juno 60 keyboard, indicating its use in his setup.

A FOH stage hand sent out a couple pictures of Chris Stapleton's live rig on May 27, 2016 in Simpsonville, SC at the Charter Spectrum Amphitheatre. The stage setup clearly matches the setup seen in various videos around the web from early-2016 shows. The Roland RE-501 Chorus Echo can be seen clearly on top of Chris' rack setup.

In this photo taken from an xlr8r article, you can see John Hopkin's Roland RE-501 Chorus Echo.

Again you can see the thru the whole video but you can clearly see it at 1:28 in the attached video.

It is stated in this article that He used a Roland RE-501 Chorus Echo

Used for the lead vocals on "Angel Dance", as stated by tracking and mixing engineer in this Mike Poole in this December 2010 Sound on Sound article.

Vocals: Urei 1178, API 550, LT Sound CLX, Roland SRV2000 & RE501, AMS RMX16, TC Electronic D•Two.

"I had the Urei 1178 compressor and the API 550 EQ on Robert's vocal, along with a parallel channel that was even more compressed. So any time he hit a low note that sounded a little muddy and needed some more clarity, I pushed up the parallel channel. There's also an effects send channel with the LT Sound CLX on it, which is a Dbx VCA compressor with a good de?esser in it, and that was used as the send to any effects devices. As a side note, all the little slices you see on the screenshot were not performance edits, but mostly me trying to get the sibilance right. I often take out little clicks and pops and also 'esses' or 'effs' out manually. A de?esser will hit everything in a technical?sounding way, and sometimes you may want to retain the emotive way a certain 'ess' or 'eff' is expressed, but only precisely change the gain, just to correct recording artifacts. 'Angel Dance' is one of the few tracks on which Robert's scratch [tracking] vocal didn't make up the largest component of the final vocal track. On this song, he re?sang the vocals later, and I think he did two passes and we used mostly one, with a few lines from the other pass thrown in. For reverb on his vocals, I used the SRV2000 long reverb and a little bit of RMX16; for delay, either the D•Two or an RE501. I used very little reverb on the tracks on the album in general, apart from on Robert's vocals and the backing vocals. The other ambience you hear may have been a long delay from the 501 or PCM42 or any of the room mics.”

Roland RE-501 is included in the list of outboard FX used on the Recoil album subHuman.