A good article, Angie. I hadn't seen the little animation taking us from Earth to UY Scuti - I've bookmarked it for possible future use.
I wrote on this topic as
How Big Are the Biggest Stars. For the biggest star, in terms of radius, I went for W26 rather than UY Scuti. But the error bounds are so large that it's impossible to say which one is larger. At least for now.