Here's Miller's very first published story in Gold Key's
THE TWILIGHT ZONE 84, June 1978, "Royal Feast", 3 pages, with an unknown writer, and what appears to be both Frank Miller pencils and inks.
And also by Miller,
TWILIGHT ZONE 85, July 1978, "Endless Cloud", 5 pages, with Miller pencils and inks.
Here's Miller's first Marvel story,
JOHN CARTER OF MARS 18, November 1978, 17 pages, by Chris Claremont with art by Frank Miller/Bob McLeod, a very impressive first story, Miller was blessed with an outstanding and very compatible inker.
And one more you've probably never seen,
MARVEL TWO-IN-ONE 51, May 1979 17 pages, a team-up of the Thing with the Avengers, written by Peter Gillis, with art by Frank Miller/Bob McLeod, a great combination, definitely on the "wild, wonderful" side of the spectrum.
