SWAM Saxophones are 276 MB. (RAM occupancy: about 80 MB for each instrument instance)
Samplemodeling Trumpet is 280 MB. Includes “Three B♭ Trumpets; Cornet; Flugelhorn; German Trumpet; Piccolo Trumpet; A ready-to-use Unison Ensemble Multi, including three B♭ Trumpets with Ensemble Maker, along with an appropriate ambience/convolution reverb, suitable for unison playing from a single MIDI source.”
Samplemodeling Trombone is a bit bigger at 720 MB.
IK Hammond B-3X is a great jazz organ and is 700 MB.
I’ve been using all of the above for jazz stuff.