Jumping in with my two-pennyworth, for what it's worth.
I think the first one is absolutely valid. It's not really 'telling' in the sense of simply describing the act of looking; it's a conscious, deliberate non-action (and then action) that's being articulated by the character as part of her reaction to the actions of another person. If you like, it's a signifier of her emotional state.
In my mind, that's very different from 'look' used in the 'telly' sense, where it's just 'I looked at the view...' rather than describing the view and the emotional reaction to it.
The second one is still ok, I think, for the reasons you state. You could, if you were so inclined, tweak it to remove the 'telly' verb.
She switched pencils and started shading the underbelly of her dog with the soft lead. Soft scratching. Then silence. When I looked up, her pencil was poised over the page, her head cocked to one side. I followed the line of her eyes. The unfamiliar boy...
Not so telly, perhaps. But also, arguably, less direct!
Same with the third one. Your rationale for it (as series of camera shots) makes perfect sense. I think this one, too, could be tweaked in a similar way to number two. Maybe something like:
‘Why would he…?’ Behind me, the crazies started their usual in-joke tittering. Reluctantly, I turned my head. Frankie's tongue protruded from his mouth, wagging.
But I don't think any of your examples are really 'filtering' in the sense in which it's usually frowened on. In my (inexpert) opinion, they'd all pass muster as they are!