I'm wondering, what if you found a style you believe could be enhanced with a jazz flugelhorn solo and identified the RealTracks used in the style.
Then you could take one of the Realtracks and run ALL the wave files through the Audio Chord Wizard. The Audio Chord Wizard can "build" the chord sheet or at least help you determine what chords that RealTracks instrument provides.
Once you have a chord sheet you can more easily determine what solo is appropriate.
Jim Fogle - 2022 BiaB (923) RB (Build 4) Ultra+ PAK
Cakewalk - Zoom MRS-8 recorder
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Music at: https://fogle622.wix.com/fogle622-audio-home