1966-1967-era Neal Adams (around the time he was doing work for CREEPY and EERIE, before he made it over to DC) ?
Even if it's not Neal, it's quite nice.

In a COMIC BOOK MARKETPLACE interview, Neal Adams let on that he'd wanted to leave his early/mid 1960's Ben Casey strip to pursue
magazine illustration, and when the agency lost his portfolio, Adams decided to have a go at comic books as a plan B option.

Imagine the treasures we'd never have seen, if that portfolio had not been lost!