How is this thread so long?
I don't think Beyoncé's up there with Madonna, who was pretty consistently excellent for about 25 years (minus a couple of questionable detours, every legend has them!), aside from some singles beforehand Beyoncé's only really been interesting since ~2011.
I'd consider Beyoncé to be above Whitney and Mariah, who both made very mediocre music and were completely manufactured their entire careers, never once saying anything interesting about anything.
I'd say she's about level with Janet, who made a few good records between
Control and
Velvet Rope, actually managing to innovate a bit musically in her work with Jam and Lewis and having a personality/point of view.
yes she is. She's now capable of selling out stadiums just with her name and not albums/hits, she has all the talents Madonna has and her videography is better. Sorry to the Madonna fans, but Madonna is fading and Beyoncé is here to take her place 
