an artist that i find inspiring as im working on experimental drawings is Robert Motherwell. 
check out his work below

http://upload.wikimedia.org/wikipedia/en/3/32/Robert_Motherwell's_'Elegy_to_the_Spanish_Republic_No._110'.jpg

http://themodern.org/sites/default/files/motherwell6_0.jpg

http://themodern.org/sites/default/files/motherwell3.jpg

http://dradis.ur.northwestern.edu/multimedia/thumbs/2009/08/motherwellstory.jpg