Please forgive me for buttin in but I couldn't resit it. Nimrod, you mention Johnny Dankworth yet not Cleo Laine, one of the most wonderful jazz singers of our time!
A friend gave me an old copy of Saga Magazine recently. After I'd stopped sniggering, thinking it'd be a load of old tosh, I leafed through it and found a wondrous article on Cleo who is now 84 years old and looks like a spring chicken. Taught me a lot, especially the fact that the night John Dankworth died, she sang to a huge audience and didn't tell a soul for fear she'd spoil their fun.
Cleo rules OK, second only to the late great Ella!!