For me Al Pacino:

Godfather collection
Heat
City Hall
Insomnia
Devils Advocate
Dog Day Afternoon
Any Given Sunday
Serpico
Scent of A Woman
Carlitos Way
Scarface
Donnie Brasco
And Justice For All
The Insider
Glengary Glen Ross

According to DVDSpot, it is Bruce Campbell with 52 DVDs featuring him. Some are repeats, like I have several Evil Dead DVDS, and some are TV shows. Vincent D'Onofrio is second with 32, followed by Ted Raimi at 27.

Back when Guzzlefish was still in full force, this would have been easy for me to answer. Even so, I'm fairly sure that James Stewart is the actor that I have the most DVDs of.

Rope
Rear Window
The Man Who Knew Too Much (1956)
Vertigo
Anatomy of a Murder
Bell, Book and Candle
Call Northside 777
Flight of the Phoenix
Harvey
It's a Wonderful Life
Mr. Smith Goes to Washington
The Philadelphia Story
Shenandoah
You Can't Take it With You

Bobby D

Angel Heart
Brazil
Casino
The Deer Hunter
The Godfather Part II
Goodfellas
Jackie Brown
The Mission
Once Upon a Time in America
Raging Bull
The Score
Taxi Driver
The Untouchables

Toms Hanks - 26

The Burbs
Apollo 13
Apollo 13 Anniversary Edition
Bachelor Party
Band of Brothers
Big
Cast Away
Forrest Gump
From the Earth to the Moon
The Green Mile
Joe Versus the Volcano
A League of their Own
The Money Pit
Nothing in Common
Philadelphia
The Polar Express
Saving Private Ryan
Sleepless in Seattle
Splash
The Terminal
That Thing You Do
Toy Story
Toy Story 2
Turner & Hooch
Volunteers
You've Got Mail

Without actually checking I'm sure it's John Wayne or Clint Eastwood.

Oddly enough i think for my smallish collection its Ben Affleck:

Mallrats
Dogma
Chasing Amy
Jay and Silent Bob Strike Back
Daredevil
Dazed and Confused

Animated TV shows take up a good chunk of my little collection so tops is voice actress Tress MacNeille.

In fact, in my DVD Spot set up, under Top 20 Actors, Christopher Lee is the only actor on the list without a voice acting credit.

I just picked up a bunch of older Jackie Chan films during the DDD sale, so I'm reasonably sure that's the answer for my collection.

Cary Grant - 21

An Affair to Remember
The Bachelor and the Bobby Soxer
The Bishop's Wife
Bringing Up Baby
Charade
Destination Tokyo
Gunga Din
His Girl Friday
The Howards of Virginia
Monkey Business
Mr. Blandings Builds His Dream House
My Favorite Wife
Night and Day
North By Northwest
Notorious
Once Upon a Time
Only Angels Have Wings
The Philadelphia Story
The Pride and the Passion
Suspicion
To Catch a Thief

He's my favorite actor so not surprising that's he's numero uno. My highest actress is Marilyn Monroe at 14.

Carrot Top - 2

Chairman of the Board
Dennis the Menace Strikes Again!

Never counted, but I'm guessing De Niro, Pacino, Hanks, and Cruise are among the leaders.

Kurt Russell: Soldier, Breakdown, Dark Blue, a couple others I think.

Jet Li. They're so damn cheap to import from Hong Kong/China!

Probably George Clooney, but could be wrong since I do not have my dvds on one of those niffty websites.

Matt Damon. Great actor, most of his movies are very re-watchable (Bourne Identity, Good Will Hunting, Talented Mr. Ripley).

From memory, I'll say Harrison Ford

Star Wars x 3
Indy Jones x 3
Fugitive
Air Force One

= 8

My favorite actor, De Niro:

Angel Heart
A Bronx Tale
Cape Fear
Casino
The Deer Hunter
The Godfather Part II
Goodfellas
Jackie Brown
Mean Streets
Meet the Parents
Once Upon a Time in America
Raging Bull
Taxi Driver

I eventually want to pick up Midnight Run, Mad Dog and Glory, and The King of Comedy to complete my collection of my favorite De Niro movies. (unless he makes another good movie in the future--not likely).

The same theme for the thread appeared a couple of months ago. As i said then, i think in my collection it is probably Clint Eastwood. I have the following of his films:

A Fistful of Dollars
For A Few Dollars More
The Good, The Bad and the Ugly
Firefox
The Eiger Sanction
In the Line of Fire
Dirty Harry
Magnum Force
The Enforcer
Where Eagles Dare
Kelly's Heroes

And i still need to pick up Heartbreak Ridge, Pale Rider, Outlaw Josey Wales.

I just realized that i have all the Basil Rathbone Sherlock Holmes collection....so i guess he would count as well. 14 films in total.

Denzel: 14

The Manchurian Candidate
Man on Fire
Out of Time
Antwone Fisher
John Q
Training Day
Remember the Titans
The Hurricane
The Bone Collector
The Siege
He Got Game
Devil in a Blue Dress
Philadelphia
Mo' Better Blues

DeNiro is second with 11.

Jean-Claude Van Damme - 26

Black Eagle
Bloodsport
Death Warrant
Derailed
Desert Heat
Double Impact
Double Team
The Hard Corps
Hard Target
In Hell
Kickboxer
Knockoff
Legionnaire
Lionheart
Maximum Risk
Nowhere To Run
The Order
The Quest
Replicant
Second In Command
Street Fighter
Sudden Death
Timecop
Universal Soldier
Universal Soldier:The Return
Wake OF Death

Kelsey Grammer - currently 6 seasons of Cheers, 9 seasons of Frasier.

Rob

No suprise, Bill Murray with 14:

Broken Flowers
Caddyshack
Ghostbusters 1 x3
Ghostbusters 2 x3
Groundhog Day
Kingpin
The Life Aquatic
Lost in Translation
Quick Change
Royal Tenenbaums
Rushmore
Stripes