Quasar did more than sucker punch him. Before the Stranger and crew stepped in, he had the Watcher on his knees. And PS it was the Watcher that sucker punched Quasar.
On average? I'd say Odin. You have some instances where the Watchers are played up in power, equals to Cosmic Entities and all that, but that doesn't happen often from what I've seen.
Post retcon molecule man fought and lost to a watcher if i recall
There was the watcher from the unilord/surfer series...
Other than that i cant think of stuff that hasnt already been said...
__________________ Quotes from Hia8:
"I claimed that the science is sometimes faulty."
"You don't understand. This is fiction. That means none of this stuff really happened."
"There is no writer to purposely ignore a character's natural ability just because it suits the story."
"in some cases because the writer knows that Character A will dominate Character B easily and refuses to allow this to happen for the sake of the story."
Sorry for just throwing that out there but i think people don't really think watchers are much because they haven't done shit in mad long except getting punched by Rulk... (seriously wtf was up with that?).