I'm only going to limit myself to contemporary composers, since listing the dinosaurs will take ages, right?
http://www.youtube.com/watch?v=CHVMVDhC-UA
http://www.youtube.com/watch?v=BM9BBOmznKQ
http://www.youtube.com/watch?v=_Xns8VOfe9g
http://www.youtube.com/watch?v=M366oATKBns
http://www.youtube.com/watch?v=p5fJLAZEluA
Leo Brouwer (can't find any good videos of him on Youtube, but he's the modern equivalent of Bach for the classical guitar)
http://www.youtube.com/watch?v=qOpPqaqm_Qc&feature=fvst
http://www.youtube.com/watch?v=feTJYmXM4LI&feature=related
http://www.youtube.com/watch?v=imbwn6iVryQ
http://www.youtube.com/watch?v=rDOXxa1U7Oc
http://www.youtube.com/watch?v=Hs0S1L2plT8
And of course Morricone!