Yes, I know. His personal life is a bit complicated. But the guy’s body of work is phenomenal. Here’s his website and his wikipedia.

And this, from Annie Hall, the best opening to a comedy ever:

There's an old joke.  Uh, two elderly
women are at a Catskills mountain
resort, and one of 'em says: "Boy, the
food at this place is really terrible."
The other one says, "Yeah, I know, and
such ... small portions." Well, that's
essentially how I feel about life.  Full
of loneliness and misery and suffering
and unhappiness, and it's all over much
too quickly.  The-the other important
joke for me is one that's, uh, usually
attributed to Groucho Marx, but I think
it appears originally in Freud's wit and
its relation to the unconscious.  And it
goes like this-I'm paraphrasing: Uh ...
"I would never wanna belong to any club
that would have someone like me for a
member." That's the key joke of my adult
life in terms of my relationships with
women.