I don’t have a one-fits-all pick for visuals so I’ll break it down into different sub-categories. (I also get to cheat this way and pick several)

Line art: Violet Evergarden

Composition: Hyouka

Cinematography: Wonder Egg Priority (early on at least)

Artistic style: Keep Your Hands Off Eizouken!

Atmosphere: Haibane Renmei

Choreography: Cowboy Bebop: Heaven’s Door

Compositing (not to be confused with “composition” above): Sound! Euphonium

Background art: Grimgar of Fantasy and Ash (RIP Hidetoshi Kaneko)

ps.: OP gets an updood for Akebi’s Sailor Uniform. It’s one of my 10/10 and is criminally underrated.