Hal Ashby was a favorite of mine I left out.
Coen Brothers, Tarantino, Zemeckis, Burton, Scorsese, David Fincher.
Kubrick blows hot and cold for me. I can watch his pre-Space Odyssey movies over and over, but I have completely finished with his post-Strangelove work. Except for The Shining, maybe.
Thanks, that was a weird mistake on my part. (I needed to look up Dieterle to get the spelling right. Maybe my brain locked on his first name somehow)
Not really in order:
Krzysztof Kieslowski
Oliver Stone
Robert Altman
Robert Bresson
Darren Aronofsky
Jessica Yu
Olivier Assayas
Hmm, no love for Wes Anderson? Too twee?
I enjoyed Isle of Dogs, Grand Budapest Hotel, and Fantastic Mr. Fox, but I think that’s all I know of his stuff. Not good enough for me to put on a par with Buster Keaton or The Passion of Joan of Arc.
No Ingmar Bergman either, unless I missed him.
Many of mine have been mentioned so I’ll add
Brad Anderson
Roman Polanski
I also think we’ll be seeing a lot of good things from Ari Aster (*Hereditary *and Midsommar)
One of my least favorites, actually. Yes, too twee. 
How could I forget David Fincher? He goes in the top category (but all those you mention are great ones)
Coen Brothers
David Lean
Alfred Hitchcock
Billy Wilder
John Ford
Ridley Scott
Stanley Kubrick
Most of my favorites have been mentioned…I’ll add Werner Herzog to the list.
Two of my other favorites that have not been mentioned yet (unlike dozens of others) are Wim Wenders and Francois Truffaut, I think the first mention of a French director, which is kind of surprising.
ETA: Sergio Leone was also missing.
In no particular order, but these are directors I’ll actively seek out…
Quentin Tarantino
Guillermo del Toro
Akira Kurosawa
And a special runner up, since I’ve only seen a couple, but was consistently impressed and intend to track down more:
Taika Waititi
I consistently enjoy Rob Zombie’s flicks, but then forget about them about 5 minutes after they finish, so…his name being attached is a draw, but wouldn’t count him as a favourite. (I’m not entirely sure I actually followed Lords of Salem even when I was watching it, but I know I enjoyed it.)
Twee is FUNNY. Charlie Chaplin is twee.
But in a perverse kind of twee[sup]*[/sup]. Some of “The Gold Rush” and “The Kid” i. e. is rather edgy.
*: that’s the right kind of twee. Like my favorite band Belle And Sebastian.
Adding George Cukor
Yeah, but he wasn’t “I want my movies to look like New Yorker cartoons, but with more face-on and profile shots” twee.
All of mine have been mentioned other than (of all people) Bobcat Goldthwait. Yeah, the screaming goofball from Police Academy 2.
Seriously. World’s Greatest Dad is my absolute favorite piece of cinema, hands-down. I’ve never not at least been fascinated by something he’s directed.
Kenneth Lonergan (You Can Count on Me; Margaret; Manchester by the Sea).
He captures, like no one else, the bittersweetness of dysfunctional family relationships.