How many Kim Parks were there?
Radar’s teddy bear - that count?
It was Kim Luck. Hawkeye mentioned “it must be our Kim Lucky day.”
he’s halfway down the list
Nurse Able - played by Judy Farrell, wife of Mike Farrell
Spearchucker Jones
Colonel Flagg
Dr Sidney Friedman
Benjamin Franklin “Hawkeye” Pierce
(Corporal)Sargeant Maxwell Q. Klinger
Corporal Lance Spaulding (played by Loudon Wainwright III)
Lt Col Donald Penobscot
Margaret “Hot Lips” (O’)Houlihan (she was more Irish in the movie)
Colonel Sherman Tecumseh Potter
Corporal Walter “Radar” O’Reilly
Captain Jonathan R. Tuttle
Maj. Charles Emerson Winchester III
Nurse Kelley
Five O’Clock Charlie
Lt Col Henry Blake
B.J. “Beej” Hunnicut
Seargent Zelmo Zale
The helicopter pilot with diabetes
Fr. Francis Xavier Mulcahy
Double Dear John John from Reno, AKA Cowboy
Ho-Jon
Major Frank Burns
Rosie
General Douglas MacArthur (tho not a speaking role)
General Steele “Hey, hey, Uncle Bud, gonna beat my feet in the Mississippi mud!”
Sparky, friend of company clerks everywhere
Lieutenant General Robert “Iron Guts” Kelly
Pvt. La Roche
Trapper John McIntyre
Marine Sgt. Marty “The Trenton Tornado” Urbancik
Lt Dish
Wendell Peterson
Inga
Soon Li Klinger
Edwina “Nurse Eddie” Ferguson
Captain Casey (the fake doctor)
Lt. Nugent
Aggie O’Shea, the reporter
Duke Forrest
“Painless” Woldowski
Charlie Lee
the orphans - colletively, they count as one character
Donna, aka Mrs Chuck Winchester
Radar’s teddy bear
Kim Luck
45
46, with Nurse Able
Captain Simmons, the hotshot who drove Charles to drink and made Col. Potter lie around in bed nursing a sore leg and feeling sorry for himself.
Also, Dr. Borelli, played by Hawkeye’s real life father, Robert Alda.
A visiting preacher, played by Ned Beatty. I think he was Col. Hollister.
Leo Bardonaro (James Cromwell)
Colonel Daniel Webster Tucker “A shot and a beer”
Can’t believe we missed this one so far: Father Francis J. Mulcahy
Bonus: Cpl. Igor Straminsky
Thank you for catching that, Lute. I was about to storm in here demanding an apology from Doors for daring to doubt my veracity! 
Spoke too soon; I see it now. But IDMB says Mulchay’s middle initial is J.
Tommy Gillis, Hawkeye’s childhood friend who got killed
Private Wendell Peterson (played by Ron Howard), the underage soldier Hawkeye snitched out after Tommy’s death
Private George Weston, the decorated soldier Burns tries to get dishonorably discharged for being gay.
I love MASH. You know, I’m actually very close friends with the actor who played Captain Tuttle.
If Capt. Tuttle counts, then Pvt. Charles Lamb should, too.
Captain Pak (Pat Morita)
Ugly John, the gas-passer
The P.A. system
Pvt. Gary Sturgis (Patrick Swayze). What did this character do? I don’t remember.
58:
(and I alphabetized them - Wendell was used already)
Aggie O’Shea, the reporter
B.J. “Beej” Hunnicut
Benjamin Franklin “Hawkeye” Pierce
Captain Casey (the fake doctor)
Captain Jonathan R. Tuttle
Captain Pak
Captain Simmons
Charlie Lee
Col. Hollister
Colonel Daniel Webster Tucker “A shot and a beer”
Colonel Flagg
Colonel Sherman Tecumseh Potter
Corporal Lance Spaulding (played by Loudon Wainwright III)
(Corporal)Sargeant Maxwell Q. Klinger
Corporal Walter “Radar” O’Reilly
Donna, aka Mrs Chuck Winchester
Double Dear John John from Reno, AKA Cowboy
Dr Sidney Friedman
Dr. Borelli
Duke Forrest
Edwina “Nurse Eddie” Ferguson
Five O’Clock Charlie
Fr. Francis J Mulcahy
General Douglas MacArthur (tho not a speaking role)
General Steele “Hey, hey, Uncle Bud, gonna beat my feet in the Mississippi mud!”
Ho-Jon
Inga
Kim Luck
Leo Bardonaro (James Cromwell)
Lieutenant General Robert “Iron Guts” Kelly
Lt Col Donald Penobscot
Lt Col Henry Blake
Lt Dish
Lt. Nugent
Maj. Charles Emerson Winchester III
Major Frank Burns
Margaret “Hot Lips” (O’)Houlihan (she was more Irish in the movie)
Marine Sgt. Marty “The Trenton Tornado” Urbancik
Nurse Able
Nurse Kelley
Painless Woldowski
Private George Weston
Pvt Charles Lamb
Pvt. Gary Sturgis (Patrick Swayze).
Pvt. La Roche
Radar’s teddy bear
Rosie
Seargent Zelmo Zale
Soon Li Klinger
Sparky, friend of company clerks everywhere
Spearchucker Jones
The helicopter pilot with diabetes
the orphans - colletively, they count as one character
The P.A. system
Tommy Gillis
Trapper John McIntyre
Ugly John, the gas-passer
Wendell Peterson (Ron Howard)