Star Wars
While Star Wars featured heavily in my prior research, as the franchise expands, more points can be examined and analyzed. There have been several arcs that would equate to cosmic horror in the Star Wars universe, and the series continues to feature archaeological ideas in new pieces of media.
This was an arc that took place across the mainline Star Wars comics and the first Doctor Aphra series. It was spread across five comic issues, as Doctor Aphra and Luke Skywalker faced the cosmic horror at the citadel and unattempted to unlock the Jedi in the ancient artifact Aphra got her hands on.
The Screaming Citadel #1
Star Wars (2015) #31+32
Doctor Aphra (2016) #7+8