Which director directed most of your favourite films?

hard to name one. my lists are too cluttered & ill-defined to single one name out.
guy maddin might be at the top.
the coens would definitely be near the top as well

others would be in the mix:
herzog, probably.
yorgos lanthimos.
pta for sure.

I don't have any that go beyond two films. And there's a fairly long list of those.

Alfred Hitchcock (6 films in my top 50)

Psycho
Rear Window
Rope
Strangers on a Train
North by Northwest
Dial M for Murder

QT
Coen bros
Woody Allen

David Fincher (3)
Zodiac
Seven
Fight Club

John Ford

The Searchers
The Man Who Shot Liberty Valance
Stagecoach
The Grapes of Wrath
My Darling Clementine
How The West Was Won
Fort Apache
She Wore A Yellow Ribbon

I tend to try to watch everything from a director over time and these are some that I really enjoy most of their work and my top 2 listed:

Steven Spielberg - Jaws, Raiders of the Lost Ark
Umberto Lenzi - Man From Deep River, Nightmare City
Stanley Kubrick - Dr Strangelove, The Shining
Fernando Di Leo - Italian Connection, Il Boss
Dario Argento - Suspiria, phenomenon
John Carpenter - The Thing, Starman
Sergio Leone - Good Bad Ugly, Once Upon a Time in TheWest
Antonio Margheriti - The Last Hunter, Hell of the Living Dead
George A Romero - Night of the Living Dead, Martin
Quentin Tarantino - Death Proof, Pulp Fiction
The Cohen Brothers - No Country For Old Men, Big Lebowski
Russ Meyer - Faster Pussycat Kill Kill, Super Vixens
Lucio Fulci - Zombie, The Beyond
Werner Herzog - Aguirre, Little Dieter