his clavinet can be seen at the top of his keyboards

A photograph clearly shows Jonny Greenwood with the Hohner Clavinet D6, confirming his use of this specific musical instrument.

It's on top of Paul's Mellotron MkII in his home studio. You can see it in a video of Paul playing his mellotron, and also part of it in this video, starting at 5:15.

Prince played a Hohner Clavinet on the For You and Prince albums. It is mentioned in the credits to For You.

John Paul Jones started using a Hohner Clavinet on Led Zeppelin’s 1975 album Physical Graffiti, specifically on the tracks “Custard Pie,” “Trampled Underfoot,” and “In the Light.”

“Trampled Under Foot" is Jones's classic Clavinet track, and it was one of the band’s best songs when played live. The song begins with the Clavinet part, and its heavy, driving "stomp" rhythm pushes the song throughout. The clavinet solo is an energetic and busy chordal improvisation. As the solo plays, a second clavinet track is added -- a dark, muted sound that was created by running the clavinet through a wah-wah pedal set back to a very low range.

Video: Trampled Underfoot Live 1975

Frank Zappa's Hohner Clavinet D6 was listed for sale on Reverb in January 2024. The instrument was previously auctioned by Julien's.

The following comes from the Reverb listing:

This Hohner Clavinet D6 keyboard comes from the Julien's Frank Zappa Auction. This Clav can be seen in many Zappa concerts in the 1970's with George and other Zappa alumni playing after George's tenure. The Clavinet D6 was a part of Frank Zappa's sound. George Duke who played keyboards and synthesizers can be seen using a Clavinet D6 live in the film Roxy: The Movie (Eagle Rock Entertainment, 2015), a concert film of Zappa's performances at The Roxy in 1973. The Clavinet D6 has 60 keys, the control panel to the left of the keys has six rocker switches. The switches labeled "AB" and "CD" control the pickup selection. The switches labeled "Medium" and "Soft" activate a low-pass filter and the switches labeled "Brilliant" and "Treble" activate a high-pass filter. There is a volume knob on the control panel. The top panel is finished in a teak veneer. There is a clear plastic music stand which is secured to the inner side of the removable lid. There is a metal fader to the right of the keys. The Clavinet D6 is housed in a wooden carrying case that is finished in black vinyl. The vinyl has scuff marks and wear from the years of use. The casing is original and features a back panel that has a 1/4" output, a 6-9 Volt Adapter socket, the Hohner logo, Clavinet D6 printed. The carrying case has protective metal corner covers. The removable lid is finished in a light gray vinyl, has protective corner covers and has K9 stenciled on the top.

In the video titled "INSIDE: Charlie Puth Home Studio" by Caleb Simpson on YouTube, a Hohner Clavinet D6 is visible at 0:08, positioned at the bottom of a synth rack in Charlie Puth's studio.

According to this article, Wright used a Hohner Clavinet D6 occasionally.

Full article here.

In this video you can see Vangelis playing on a Hohner Clavinet D6

Ryuichi Sakamoto can be seen playing Hohner Clavinet D6 in this post.

In this photo, Wakeman can be seen with a Hohner Clavinet D6.

In the photo, Stevie Wonder is pictured playing the Hohner Clavinet D6, highlighting his long-standing association with this iconic electric keyboard.