its really impossible for me to narrow it down to a script or two. Here's a few off the top of my head.
Kubrick's Lolita- Nabokov's script had an amazing blend of comedy and drama. I love the sense of humor that comes through the dialogue that the characters say. And the opening and closing for it is an almost dark gloomy mystery form, which is really the total opposite of the rest of the story. It also has great pacing.
Lynch's scripts have really grown on me. I really love Wild At Heart, Twin Peaks: Fire Walk WIth me, Lost Highway, and Mulholland Drive. Again, love the dark sense of humor, and unpredictibility and sometimes unlinear view of things. It took me a long time to realize how great he is at writing dialogue. its sometimes realistic, strange, witty, or hillarious.
I do love Kevin Smiths dialogue as well and to me, its the best as far as comedy goes. Clerks, and the first half of Chasing Amy is some of the funniest stuff I ever heard. You can keep your eyes shut and still laugh your ass off.Chasing Amy from the start makes you think you have a predictible romantic comedy yet it changes so much. And of course Dogma is so smart and mature, and still full of Smiths dirty dialogue. all of his scripts from clerks to dogma are great.
and I still love Tarantinos scripts as well (Though I'm as big a fan of his films as I was a year or so ago). But I guess I don't have to explain them. Someone else might do it anyway somewhere on this thread.
thats all I can think of off the top of my head.