Eclipse's third graphic novel (8" X 11") was THE PRICE by Jim Starlin, released in Oct 1981.

It was preceded by "Metamorphosis Odyssey" in EPIC ILLUSTRATED 1-9 ( 113 pages total, in installments of 8 to 16 pages per issue) from Spring 1980-Dec 1981.
https://comiconlinefree.com/epic-illustrated/issue-1

It was black and white, and many missed it. So Marvel/Epic re-released it as DREADSTAR ANNUAL 1 (and only) in 1983, with color added. Here it is in its entirety for you to read, 46 pages:
https://comiconlinefree.com/comic/dreadstar


It was followed by DREADSTAR (Marvel graphic novel 3, Oct 1982), also 46 pages:
https://comiconlinefree.com/marvel-graphic-novel/issue-3_-_Dreadstar


(all three are collected in the hardcover DREADSTAR:THE BEGINNING, released in 2010, collecting all the painted art in one volume. After that Starlin went back to pen-and-ink art.)



Then followed by Marvel's 64-issue DREADSTAR comic series (1-31 by Starlin, after that continued by lesser hands).
https://comiconlinefree.com/dreadstar/issue-1


The first 5 issues were as good as the previous DREADSTAR work, after that I felt the series declined and became episodic, more like just another issue of the X-MEN or similar fare. But Starlin's first 5 years or so gave us some of the best comics storytelling the comics field has ever seen.