Emma Besing. https://www.girlswithmuscle.com/images/?name=... Beautiful and a literal flawless upper body IMO
It's a toss up between Ruzh and Emma. Those two seem to be at the upper limit of what they can both achieve without going crazy on gear.
Julia Vins would be my gold standard for size and shape; she's obviously buff but still very soft and feminine.
As much as I like big and vascular muscles, I know it's not a sustainable physique. Most of the pictures we see is during contest shape and it all disappears once they start eating normal again (and get off cycle). For that reason I prefer a more natural looking, smaller but still nice shape and definition. Michelle Gavin is a good example and so is Jodi Miller, 2 of my personal favorites. Jodi is clearly on PED's in this picture but she still manages to maintain a nice shape in her off season.
This. Imagine walking into a store with a woman this size around your arm, bulging out of her clothes, veins popping, people staring, she can't even fit through a doorway.