thanks for running this challenge and providing the recordings, franz!
here's my mix:
https://www.dropbox.com/s/x3s3xymhq42zj ... 0.wav?dl=0
i grouped the instrument sections (trump/sax/drums etc.) and used plugins on those groups.
drums: eq boost 20khz & dip 5khz - parallel devil-loc - limiter - reverb (plus eq and rbass on the kick, eq on the snare and eq high/lowpass, de-esser on the OH.)
bass: mv2 - 1176 - rbass - saturation - limiter
guitar: eq high/low pass - dynamic eq - mv2 - limiter - reverb
piano: eq high/low pass - gate - mv2 - 1176 - bx_stereomaker
brass/winds: highpass - gate - 1176 - eq boost 20 khz & dip 3 khz - limiter - plate reverb
stereo buss: presswerk - fairchild 670 (no comp, just color), eq +2db shelve >8 khz, J37 for some mojo, limiter to bring it up to -16LUFS. there is no actual limiting going on...
i would have split the snare-track into 2, hits and rimclicks, in order to treat them seperately, because there is so much spill from the HH: gate on hits + a lot of eq for more presence. but i did not have the time for additional edits. should i make it to round 2, that's very likely something, i would adjust ...

mixed with reaper 6.01
i tried to stay close to a "live" situation, so no automation, no trigger, almost no edits (snare phase-adjusted to OH, trombone-solo a little louder)
any comments welcome!
cheers, dirk.