From PLOP 8, Dec 1974, "A Likely Story" by Steve Skeates and Sergio Aragones, Ellison is hilariously parodied as a short-tempered elitist art collector named Elliot Harlanson.
Among several other parodies done of Ellison in comics.
Beyond parodies by others, Ellison also scripted or plotted many other stories in comics, his love for the medium is made plain in many of his book introductions, interviews, published fan letters and comic book story collaborations with many in the field.
The adaptations of his work he wasn't pleased with he savaged relentlessly.
Two I can think of offhand are:
a Gerry Conway/Syd Shores adaptation of "Delusion for a Dragon Slayer" in
CHAMBER OF CHILLS 1, Nov 1972 (the short story is in Ellison's 1975 short story collection
The Deathbird Stories.)
And the Roy Thomas/Alex Nino adaptation of " 'Repent Harlequin!' said the Ticktockman " in
UNKNOWN WORLDS OF SCIENCE FICTION 3, May 1975.
As I recall, both panned by Ellison in his 1980 COMICS JOURNAL interview.
A far superior adaptation of "Repent Harlequin" illustrated by Jim Steranko appears in THE ILLUSTRATED HARLAN ELLISON, published by Byron Preiss in 1978.
An extensive interview with Harlan Ellison about his work in comics appears in
COMIC BOOK ARTIST 23, Dec 2002.
Much as I love Ellison's short stories and other prose, I have a special affection for Ellison's comics work, that introduced me to his writing.