I would definitely recommend checking out Conlon Nancarrow as well, who was mentioned at the start of the article. A lot of his stuff is somewhat abstract, and

I would definitely recommend checking out Conlon Nancarrow as well, who was mentioned at the start of the article. A lot of his stuff is somewhat abstract, and sometimes his rhythmic patterns are really too odd to be heard (e.g. 7:17:27). But then he also has pieces like Study #3a, which is just a bluesy boogie-woogie that just builds. (I would love to actually be in the physical presence of a piano playing that piece; it would be like it was possessed.)