This article states he used a pair of Emu EIV racks while on tour with Genesis in 2007.

Roger O'Donnell's keyboard rig for the Cure's Swing Tour '96 consisted of "Apple Powerbook 5200CS (plus CD-ROM drive); Furman power supply; Emu E4K keyboard sampler; Emu EIV rack sampler (with Emu CD-ROM library); Emu Proteus synthesiser; Emu UltraProteus synthesiser; Kurzweil PC88 master keyboard; MOTU MIDI Time Piece II; Roland XP50 synthesiser; Yamaha ProMix 01 mixer; Zip Drive."

In a 2016 post on Gearspace, Rhys Fulber discusses his experience creating Fear Factory's "Demanufacture" and mentions using the Emu Emulator IV.

The Emulator IV can be seen clearly on the left side of Brad's understage rack.

Long a fan of digital equipment, Steve tries to keep as much of his recording chain digital as he can, but feels that you can only get the best out of such a system if analogue signals entering the digital domain (for example vocals and acoustic instruments) are recorded to as high a spec as possible. Consequently, although his setup is based around four Alesis ADAT XT digital multitracks, an Emu EIV and Yamaha 02R and 01V digital desks, the mics and preamps at his disposal comprise some of the finest (and most expensive) analogue gear around — of which more later. Steve: "That's the kind of signal path I like; you go straight from this very expensive analogue input stage into the 02R, and then digitally on to the ADATs."

David Bergeaud was confirmed to use the Emu Emulator IV, as evidenced by listings of synths and samplers he used for "Ratchet & Clank," which were shared by a fan Facebook group.

https://www.facebook.com/groups/ratchetclankfans/posts/8289617861060344/

"Roland JV2080 + expansions, EMu Proteus, AKAI S1000 but we built our own samples for the games… I had an Emulator IV for PDZ but switched to Gigasampler. Also JP8000 on that game….but soft synths were starting to happen…"

In this 2024 video by Youtuber Groovin in G, he outlines the samplers favored by Source Direct in the 1990s (@1:40 mark). Among those named is the Emulator IV rack sampler, which (according to the evidence in the video) the duo used more for sampling from vinyl and sound quality than for its timing (the duo would apparently transfer the EMU-created samples to their Akai for sequencing, once they had them sounding right). The Emulator rack samplers of the time were percieved as a bit lax in their timing feel compared to the surgical precision of the Akai S series... but they had more synth-like tone shaping capabilities and great overall sound quality. Even much later rack samplers like the first of the Yamaha A3000 series were seen as "loose" in their timing compared to the much older Akai S series.

Goovin in G cites quotes from a 1990s Future Music interview (he holds up the issue and shows a screenshot of the quote re: their 3 main samplers), so his research checks out.

Also, you can briefly see the EIV occupying the top rack in the closing seconds of this 1996 documentary for Dutch TV (@8:55).

Note: the improved/expanded Emu E4XT model didn't ship until years after this documentary was shot, so it must be an original EIV model.