By the time you get up to the virtually omnipotent forces, it's hard to classify when they're using "strength" and when they're using "complete control of all atoms on a galactic scale in past, present and future." In the case of Dr. Manhattan, the blue-skinned god of the atomic age in Watchmen, it doesn't really matter. Doc had a traditional superhero origin (atomic lab accident) and, at first, a traditional superhero name, costume and symbol, but his ability to perceive past, present and future all at once made him more and more remote from human life, let alone any old-fashioned notions of "heroism." If he met the Hulk fairly early in his career, though, it would be a short fight. The Hulk's punches might send soundwaves that could shatter glass, but they wouldn't move a single molecule of Dr. Manhattan's flesh that he didn't want moved.