Here's the DC SPECIAL 27 issue with Captain Comet that I mentioned, from 1977, with 34 interior pages of Buckler art. It was during the period when Buckler was working for continuity, and was reaching the peak of his clonal Neal Adams stage.

Although Buckler was far from the only guy working in a Neal Adams style. I recall John Byrne saying when he worked for Charleton, and he did a DOOMSDAY PLUS ONE poster (looking very much like a Neal Adams page) , and Neal Adams visited the Charleton editorial offices and saw the Byrne page, and said to the editor "This is very nice... what can HE do?"