yet another example of concept art being used in the series…Admiral Giel’s flagship in issues 60-61 was based on a Joe Johnston sketch for Vader’s Executor…https://starwars.fandom.com/wiki/Helmsman_(battlecruiser)
That’s a pretty cool design. It’s interesting that version shown at the top of the wookieepedia article resembles the comic version more than the reverse-angle sketch, so in a sense the “canonical” design is more Smonson/Palmer than Joe Johnston.
This makes me wonder if some of Infantino’s wacky star destroyer designs were based on anything pre-existing as well;
http://www.battlegrip.com/9-incredible-star-destroyers-by-carmine-infantino-found-in-marvels-star-wars-comics/