This is my ethereal adaptation of Gustav Mahler's "Adagietto."  While somewhat unusual in nature, it is a great solo vehicle (written for lead tenor but easilly transferred to another instrument) for the soloist/s in your band.  
 
Trumpets double on flugelhorns and there are not many tricky rhythms BUT entrances are easy to miss if you aren't counting!
 
Listen to the Greg Johnson Big Band play "Adagietto" here:
 
Ethereal "Funky" Ballad
Run Time: 6:21
Lead Tenor Saxophone feature but easilly switched to another instrument.