When you say the vocals separately, do you mean in another pass? If so, I'd say record them with the band instead. You're a bit short on mics, but if it were me I would skip the di's and go like this -
Fatheads as a pair over the drums, RE20 on the upright bass, MD421 on the brass, have them both play towards the one mic, KSM32 on vocal and 57 on guitar.
I'm not a fan of di stuff for jazz ensembles, but that's not to say it;s wrong, it's just my preference.
Good luck, have fun with it.
Get another 421 for the brass if you can, and you might try to give the singer a 58 to get bleed manageable, especially if it's a live performance and she's in front of the band.
Definitely go mic AND direct for the double bass. DI can get you some definition over drum bleed, mic gives you better sound if drums don't bleed too much.
Not sure if I'd go stereo for drums. Often just one mic in the "near the drummer's right ear" position works fine, when there is enough bleed in the other mics to add space.
I tend to use a DI on the bass as a fallback, especially with acoustic jazz in a less than ideal room with little treatment (Auralex squares don't really count) and no gobos.
You only need a room mic if you're going for a primarily 'room' sound with accent mics. Otherwise, you probably won't need a "room" mic as there will be plenty to bleed... especially with those ribbons.
You'll want the drum overheads closer than you'd think, and be sure to point the horns (and most of the other instruments) away from the overheads.
Here's a set I did with 6 mics and 2 DI. I could have gotten by with fewer mics, but we wanted to make sure we got a clear snare sound as he had just gotten it from a guy who made it for him.
2 OH, Snare, Kick, GTR, Sax, GTR DI, Bass DI
It's a decent room about the same dimensions as you're working in, but I brought my own treatment. I have some 2x8 panels I built stuffed with acoustic batting. You can see them in the video - the gray panels behind drummer and next to sax.