Not to forget the prison fight episode...risky angles covered by shadows might count, too.
Creed from Black Cat has two of these...The other is when he's naked and having nanomachine treatment to make him immortal - the camera pans extremely low, but his crotch is blacked out by the shadow of some of the machinery.
In an early issue of The Incredible Hulk, Betty Ross is transformed into the Harpy sans culottes, with shadows hiding her breasts and genitals
When Mercy Thompson shifts from coyote back to human, she ends up naked. The Mercy Thompson: Homecoming comic uses anything - even shadows - to cover up Mercy's breasts and genitals.