Given that Miyazaki and Takahata retired, Masaaki Yuasa (age 50) is perhaps the world's greatest animator working today. Not only because his work has exceptional quality in itself, as he directed several masterpieces of animation, but also thanks to the highly experimental nature of his work.
Other anime directors/artists usually work within the standard "Tezuka manga artstyle" (which sometimes is know in the west as "anime") with some variation (Miyazaki's character designs are clearly different from the norm but still heavily inspired by Tezuka's style while sometimes other work breaks heavily from the usual aesthetic standards, such as Yuasa.
This post/thread will have tons of images and giffs, because they show more of Yuasa's work than words can.
Mind Game (2004) +
Being heavily experimental in it's visuals, extremely aggressive and daring, it's Yuasa's only theatrical film (as most work done in the anime industry is done for TV).
Kaiba (2008) +
It's a TV series yes, but it is listed on MUBI as a film!
This post here is pretty good description of Kaiba:
http://ahumbleprofessor.tumblr.com/p...ki-yuasa-anime
Tatami Galaxy (2010) +
One of Yuasa's most popular works, though I didn't like it as much as some of his fans do.
Ping Pong the Animation (2014) ++
The two masterpieces (at least) among those Yuasa's work I have watched are Kaiba and Ping Pong, while Tatami Galaxy won the animation grand prix in Japan's media's arts festival, the one I loved the most was Ping Pong and Kaiba, because of their highly dense emotional texture.
The character designs are as ugly as they get, while in most anime character designs appear very young, here they are 18 year olds who sometimes look like they are 70.