(Dave, cut us a little slack here, okay? This is just a brief digression, not a true hijacking - mine, but you started it :-)
Yes, she had a great voice, and certainly a lot of fabulous recordings, and deserves a lot of credit in her own right - being married to Ray Brown was no doubt quite special, but perhaps incidental. She was quite a remarkable musician, especially given the time.
I've listened to a number of related interviews - I'm pretty sure I've heard one with her, and definitely Ray. But one quote that sticks in my mind was from Orin Keepnews (long time producer for Blue Note, Prestige, and others), where he said that she just couldn't express or something - she could sing the words, hit the notes, but not tell the story with feeling. No gut level emotion.
That's probably a little harsh. But as much as I enjoy some of her recordings, many don't seem to move me in the way that I think music really should. They seem to come from the chest or lungs, rather than the heart or soul. Though plenty of them swing, and a lot are just plain fun, I'm not willing to grant her 'best ever' status.
Like all these best discussions, it all depends on how you define that. Ella was certainly great, and perhaps even best in several ways, but not in the way that matters most to me. Just my personal opinion - I assume we can comfortably disagree.
Now I'm in enough trouble already, so I'm not saying anything further about straplocks.
-Bob