Is there a better cast than Tropic Thunder?

Mars Attacks

Cast
Jack Nicholson as President James Dale / Art Land
Glenn Close as First Lady Marsha Dale
Annette Bening as Barbara Land
Pierce Brosnan as Professor Donald Kessler
Danny DeVito as Rude Gambler
Martin Short as Press Secretary Jerry Ross
Sarah Jessica Parker as Nathalie Lake
Michael J. Fox as Jason Stone
Rod Steiger as General Decker
Tom Jones as himself
Lukas Haas as Richie Norris
Natalie Portman as Taffy Dale
Jim Brown as Byron Williams
Lisa Marie as Martian Girl
Sylvia Sidney as Florence Norris
Christina Applegate as Sharona
Joe Don Baker as Glenn Norris
Pam Grier as Louise Williams
Paul Winfield as General Casey
Jack Black as Billy-Glenn Norris
Brian Haley as Mitch
O-Lan Jones as Sue-Ann Norris
Jerzy Skolimowski as Dr. Zeigler
Ray J as Cedric Williams
Brandon Hammond as Neville Williams
Frank Welker as the voice of the Martians


It's a mad Mad Mad Mad world

Cast
Principal cast
Spencer Tracy as Captain T.G. Culpeper
Milton Berle as J. Russell Finch
Sid Caesar as Melville Crump
Buddy Hackett as "Benjy" Benjamin
Ethel Merman as Mrs. Marcus
Mickey Rooney as Ding Bell
Dick Shawn as Sylvester Marcus
Phil Silvers as Otto Meyer
Terry-Thomas as Lt. Col. J. Algernon Hawthorne
Jonathan Winters as Lennie Pike
Edie Adams as Monica Crump
Dorothy Provine as Emeline Marcus-Finch
Supporting cast
Eddie "Rochester" Anderson as a cab driver
Jim Backus as airplane owner Tyler Fitzgerald
Ben Blue as the vintage biplane pilot
Joe E. Brown as the union official giving a speech at a construction site
Alan Carney as a sergeant with the Santa Rosita Police Department
Chick Chandler as a policeman outside Ray & Irwin's Garage [6]
Barrie Chase as the dancing, bikini-clad paramour of Sylvester Marcus
Lloyd Corrigan as the mayor of Santa Rosita
William Demarest as Aloysius, Chief of the Santa Rosita Police Department
Andy Devine as the sheriff of Crockett County, California
Selma Diamond as Ginger Culpeper (voice)[6]
Jimmy Durante as "Smiler" Grogan
Peter Falk as a cab driver
Norman Fell as primary detective at the "Smiler" Grogan accident site
Paul Ford as Col. Wilberforce
Stan Freberg as a deputy sheriff of Crockett County
Louise Glenn as Billie Sue Culpeper (voice)[6]
Leo Gorcey as the cab driver bringing Melville and Monica to the hardware store
Sterling Holloway as the Santa Rosita Fire Department fireman
Edward Everett Horton as Mr. Dinkler, owner of the hardware store
Marvin Kaplan as service station co-owner Irwin
Buster Keaton as Jimmy the Crook
Don Knotts as the nervous motorist
Charles Lane as the airport manager
Mike Mazurki as the miner bringing medicine to his wife
Charles McGraw as Lt. Mathews of the Santa Rosita Police Department
Cliff Norton as reporter (scene deleted)[7]
ZaSu Pitts as Gertie, the Santa Rosita Police Department Central Division's switchboard operator
Carl Reiner as the Rancho Conejo airport tower controller
Madlyn Rhue as secretary Schwartz of the Santa Rosita Police Department
Roy Roberts as policeman outside Irwin & Ray's Garage
Arnold Stang as service station co-owner Ray
Nick Stewart as the migrant truck driver forced off the road
The Three Stooges (Moe Howard, Larry Fine, and Curly Joe DeRita) as Rancho Conejo Airport firemen
Sammee Tong as a laundryman
Jesse White as a Rancho Conejo air traffic controller

If you mean while keeping the cast relatively small, Clue ranks right on up there

United colors of arse 3.

In the modern era True Romance

Christian Slater
Patricia Arquette
Dennis Hopper
Val Kilmer
Gary Oldman
Brad Pitt
Christopher Walken
Bronson Pinchot
Samuel L. Jackson
Michael Rapaport
Saul Rubinek
Conchata Ferrell
James Gandolfini
Victor Argo
Paul Bates
Chris Penn
Tom Sizemore

True Romance

Cast overview, first billed only:
Christian Slater ... Clarence Worley
Patricia Arquette ... Alabama Whitman
Dennis Hopper ... Clifford Worley
Val Kilmer ... Mentor
Gary Oldman ... Drexl Spivey
Brad Pitt ... Floyd (Dick's Roommate)
Christopher Walken ... Vincenzo Coccotti
Bronson Pinchot ... Elliot Blitzer
Samuel L. Jackson ... Big Don
Michael Rapaport ... Dick Ritchie
Saul Rubinek ... Lee Donowitz
Conchata Ferrell ... Mary Louise Ravencroft
James Gandolfini ... Virgil
Anna Thomson ... Lucy
Victor Argo ... Lenny

The Outsiders is competitive

Patrick Swayze
Tom Cruise
Ralph Macchio
Rob Lowe
Diane Lane
C Thomas Howell
Matt Dillon
Leif Garrett
SE Hinton
Emilio Estevez


Also had: Tom Waits, Flea, Nicholas Cage, and Sophia Coppola

Yes, Dirty Dozen, many of the WW2 movies.

You’re not going to give credit to the baby that gets thrown off into the ditch as they are running away from the village? That was an important role.

and of course...