Vincent Van Gogh
I admire him not only because of his incredible talent as a painter, his ability to produce some of the most beautiful and inspiring art that has even been created, but because he was able to do that while struggling with the crippling depression and mental illness that plagued him throughout his short life.
My favourite of his pieces are:
Almond Blossoms (1890)
Starry Night (1889)
Poppy Flowers (1887)