Which means girls with awesome curves and very ideal BWH measurements (according to 2020s real world standards).
Which means girls perky boobs, thin waist, and busty buttocks.
And also, nowadays' ideal female according to those professional modeling is girls with slim figure but also tall.
Next, age. Prime/Fresh age is preferred, which means 30 and lower.
In conclusion, according to those IRL data cross-referenced with OP females, I came to the conclusion that based on figure alone, Rebecca is the hottest female, with Pudding come second and Viola next.
BECAUSE OP girls are often similar to each other, girls with unique traits will be a better choice.
Among the 3 of my choices above, Pudding has DSL advantages over Rebecca, and she has virgin advantages over Viola.