I may not have understood the thread heading, but a couple of my favorite bari solos are:
Jules Demersseman's Premier Solo, for Eb Baritone Sax and Piano -
and, among others of his,
Jean Baptiste Singelee's Septieme Solo de Concert, Op. 93, for Baritone Sax and Piano-
My apologies for misunderstanding but they don't let me have anything sharp or listen to much jazz here...