Stevie Ray Vaughan

According to Guitar World:

Although Vaughan didn’t use the Roland Dimension D in his live rig, it was a secret weapon in the studio, where he often added it to his guitar tracks during mixing. Vaughan first discovered the Dimension D while mixing his guitar tracks on David Bowie’s Let’s Dance, and he liked how its subtle chorus effect thickened his guitar sound without changing his natural tone significantly like other chorus effects frequently do.

The Dimension D was used on the solos to “Mary Had a Little Lamb” and “Pride and Joy” on Texas Flood and most of the solos on Couldn’t Stand the Weather. During mixing, Vaughan would add the Dimension D effects himself via the effects send/return controls on the mixing console." – March 2013 issue of Guitar World, page 65.

2003 interview with Richard Mullen (Vaughan's audio engineer, published in December 2022 issue of Guitar World) recalls the use of Dimension D:

One effect he used when we mixedTexas Flood was this Roland delay/chorus [Dimension D] that gave a little bit of a growl sound. It was a stereo device that created phasing effects, which you can hear on the solo to “Mary Had a Little Lamb” and the end solo on “Pride and Joy.” Stevie sat at the board and brought that effect in and out as the song progressed. He used the same effect on Couldn’t Stand the Weather, too.

According to SRV Archive, this effect was used on Riviera Paradise.