Here are a few solos that are easily
the non-professional player, which still have strong musical merits:
Aria (from Aria and Scherzo)
Alan Hovhaness Prayer of Saint Gregory
Eric Ewazen Sonata - 2nd mvt.
Salm O Dewi Sant
Flor Peeters Aria (2nd mvt. of Sonata)
J. S. Bach