In this photo on billie joe's instagram, you can see billie playing this guitar.

Gary Moore is pictured with his red Gibson Firebird III, as shown in a Google image search.

According to an article by Luke Ottenhof in Premier Guitar titled "Meet the Hard Quartet, the New Malkmus-Led Supergroup," Stephen Malkmus uses a Vintage Gibson Firebird as part of his guitar setup for The Hard Quartet.

Campbell used this guitar for "The Gorge" concert with Tom Petty and the Heartbreakers, and the concert happened in 2010.

Around 7:00 in the vide, Brian Farmer points out Warren's three Gibson Firebirds.

According to this article from Gibson "Solo artist, leader of Gov’t Mule, guitar wizard for the Allman Brothers Band, Phil Lesh and Friends and the Dead, Haynes is the MVP of modern rock. And while Haynes is best known for the burly tone of his Gibson Les Paul Standards, including the Warren Haynes Les Paul Standard built by the Gibson Custom Shop, he’s also a Firebird man." Just below the quote it mentions the 1964 specifically.

Steve played a sunburst Firebird III on 14 January 1978 at the Winterland Ballroom in San Francisco. During the course of the concert his Les Paul wouldn’t stay in tune so he reverted to the Firebird as a backup.

On Jason's official Instagram, you can see him playing a red Gibson Firebird III. This guitar has dot inlays and a maestro style bridge which leads me to believe it is a III.

Johnny Winter is seen in this source video playing the Gibson 1964 Firebird III.

@toby0914 also found this secondary video and article about Johnny's use of the Firebird III. At 3:08 in the video Johnny talks about his Firebird saying "I really liked it because it looked so different, and when I tried playing it, it played great, and sounded really cool. So I got a whole bunch of them, I got six or eight firebird they're all different colors...they're all different colors."

In this photo, Archer shows his Firebirds, and the Firebird III is visible on the left side.

According to Fortus' website, Fortus uses the 1963 Gibson Firebird III.

In this photo, he pose with the Firebird in his hand. It's unknown if he used it to record some albums or if he played it on live gigs.

Steve Clark used a limited production 1976 Gibson Firebird, as seen in photo 8 on Steveclarkguitar's "Steve's Hysteria Tour Guitars" page. This model features a Kahler #2200B tremolo and a distinctive red, white, and blue Firebird logo with stars and a "76" on the scratch plate, distinguishing it from vintage Firebird III designs. Notably, this guitar lacks fingerboard binding and has "Limited Edition" stamped on the back of the headstock, with a serial number starting with "00" if produced in 1976.