Here is one very beautiful piece - Oblivion by Astor Piazzolla. This piece was nominated for a Grammy Award in the Best Instrumental Composition category in 1993. You can purchase sheet music in pdf format (no tabs this time). The sheet music contains parts for a fingerstyle guitar and for a solo instrument like violin, flute or accordion (though the guitar part itself is very beautiful and can be performed alone). Following the link you'll find this piece performed by Accordiality (where I play guitar):
https://www.youtube.com/watch?v=sM-Hvml6h0Y
 
Here is the Accordiality page on Facebook if you are interested:
https://www.facebook.com/accordiality

Please note that the arrangement is done in the A minor key which make the performance a bit easier. The original key is C minor. However, if you want to perform it in C minor on a fingerstyle giutar, you can just use a capo :)