From DC's alternative history run...about the only place I can think of where all the Legion girls (and boys, for that matter) are shown out cold in one place...
Source: some blog
From the fairly short-lived Wonder Woman newspaper strip...a pretty cool scene...
Ilovecomix.com has a fantastic collection of newspaper strips that any serious fan of the genre should take a look at..
Source: ilovecomixarchive.com
A couple of quick ko's from Kitchen Sink's late,lamented Cutey Bunny ..a book that was lost in the shuffle at the time, but was a delicious rip on Harvey Kurtzmann's work for MAD and Playboy. An unjustly ignored book!
Source: Comicsworld
Kim Possible thinks her friend is okay but in reality he is a cyborg and shocks her unconscious when she hugs him. She wakes up bound with her sidekick.
The girl in the bathing suit, Iori Yoshizuki, is kidnapped by some lunatic. When some guy knocks out some henchmen, the lunatic knocks out Iori in response. The rest is just mostly her being unconscious, while we never see her face.
I don't really know what happens but at the end of issue 4 Wynonna is captured by villains and then carried OTS. At the beginning of the following issue she is still captured but awake but somehow she is unconscious on the next page but looking great. She wakes up after some guy rescues her.
Battling a masked villain SW is surprised by another masked man who is indeed a very nice guy.
He ties her up at flashlight and gag her, then leave her in a haunted house.
Bonus: a little scene with a ghost in the haunted house where she faint unconscious. She regain consciusness out of scene.
Source: comicsworld....
The girl, Rion Akagami, was thrown off a boat and is now underwater where a venomous creature bites her in the breast. She passes out but her friend saves her and uses CPR to wake her up.
Please visit http://chadtheh.deviantart.com/ to find out how to order this comic. The issue has several physical KO scenes of the heroine, as well as a few great bondage scenes. It is well worth the $3.