I'm not an art expert at all, so I just found out about Cy Twombly. He lived from 1928 through 2011 and his work is apparently highly coveted.
Wikipedia described his style as follows, and I think they're accurate: "Twombly soon developed a technique of gestural drawing that was characterized by thin white lines on a dark canvas that appear to be scratched onto the surface."
This piece of his ("Untitled") sold in 2015 for $70.5 million.
Here are some other example of his work:
I work hard. I try to succeed. But man, this guy had it down. No one has ever been as successful at conquering life as Cy Twombly. He figured out how to make a living doing this. Nothing that anyone else can ever do is going to impress me as much as that.