Stringsinger, Nick Reynolds of the Kingston Trio used Chicago tuning,often capoed at the 5th fret, making it GCEA or ukulele tuning.

The great jazz guitarist Tiny Grimes, also used Chicago tuning on his Gibson or Guild electric tenor guitars.
Tiny Grimes - Electric tenor guitar in Chicago tuning.

GUEST,Mark Bluemel, Ry Cooder sometimes used an solid body octave 12-string guitar to get a mandolin effect on "Jesus On The Mainline.
Ry Cooder octave 12-string