Help with stupidly hard quiz

[ApocalypseNowt]

Each year my work does a stupidly hard quiz. There are many stages and we get a month to try and do it.

Anyone help me with this stage? there are 21 pictures of celebrities and I've managed to work out who they all are but now I'm stuck on working out the password to the next stage. Each picture has a coloured Roman numeral in it so I assume I have to use those to work out the answer...

Shrek The Third, and The Man Who Loved Women too.

So if I'm right, we could be looking for actors and actresses?

E is Clint Eastwood films

The letter Of the diamond might be the initial of their surname based on those two then, which might make it easier?

So the letter of each puzzle is the first letter of the surname?

I'm trying to think of actors with unusual surname initials to crack some of the others.

Brilliant work! You geniuses!
Diamond 'm' is Michelle Monaghan.
Films are Pixels, Source Code, Kiss Kiss Bang Bang, Eagle Eye.

Yes!

My 50p charity shop purchase has paid off.

Only found this thread last night and been puzzling over it ever since. Inspired work by siupdragon!
S is James stewart:
Shenandoan
Rear window
The philadelphia story
Anatomy of a murder
Mr hobbs takes a vacation
It's a wonderful life
Destroy rides again
Night passage
Vertigo

I can't find a person for Z. Doesn't seem to be Renée Zellweger or Catherine Zeta Jones.

The code along the top must give words to make a sentence maybe?

Haven't got the pics open but trying to think of Zs... Zsa Zsa Gabor?

G = Clark Gable

Four Kings and a Queen, It Happened One Night, Mutiny on the Bounty, The Misfits etc

I think I might start my own spreadsheet for this.

Or how safe would a shared google sheet be, if we were all anonymous on it?

I can see the word chiropodist in the third along the top, is that a film?

H is Tom Hardy - The Revenant, Tinker, Taylor Soldier Spy, Interception etc.

Ziyi Zhang?

O is Laurence Olivier.
Marathon Man
Oh what a lovely war

Aargh! I've got to go out...

Sorry, hit post too soon!
Memoirs of a geisha
Godzilla - king of monsters

Given the era of some of the actors, are there and for Elizabeth Taylor or Richard Burton?

Q is Kathleen Quinlan

O = Laurence Olivier

A Bridge Too Far, Oh What a Lovely War (so plays are included)

Kathleen Quinlan

breach
Independence Day
A civil action
The hills have eyes
Eagles in the chicken coop
The Dissection of Thanksgiving
made of honor
event horizon
Horns

C is Kevin Costner

Morning all! (I was up until 2 last night staring at these damn grids!

Thank you Soup!

B = Sandra Bullock - Miss Congeniality, A Time To Kill