>>82229249 (OP)
Maybe. It all depends on how fat, and how pretty she is besides her fat. Some women carry their fat very well and have it all in the hips, ass, and titties. Some have horrible fat distribution and it all ends up on their neck, face, stomach, arms, etc.
Regardless of this, it is absolutely possible and even common, for fat women to have a Stacy mindset and be just as entitled and bitchy as a typical Stacy with a supermodel body and face. Their standards can be sky high as well. It's been proven many times.