Originals for characters in "Babylon"

I just saw "Babylon" and was much more impressed than i thought I would be. It goes on for too long, and there are too many characters, and everything in it has been said in doens of inside-Hollywood films before (like Singin in the Rain, Mulholland Dr, Sunset Blvd), but it's still worth seeing.

I was surprised at how many characters were thinly veiled versions of famous Hollywood figures, but only could figure a few of them out. I'll post inside who i thought was supposed to be who, but I thought I'd ask the rest of you for help in ID'ing them.

Nellie LaRoy (Margot Robbie), the "Wild Child" comic star = most obviously Clara Bow

Jack Conrad (Brad Pitt), the biggest silent male star who fades = John Gilbert, but also Douglas Fairbanks and Clark Gable

Eleanor St. John (Jean Smart), the pretentious gossip columnist = the writer and gossip columnist Elinor Glyn and the reporter Adela Rogers St. John

Lady Fay Zhu (Li Jun Li), the sexy Asian performer who finds it hard to be cast in Hollywood and goes to Europe = Anna May Wong

Manny Torres (Diego Calva), the Mexican studio executive and central charaxter = did not know

Sidney Palmer (Jovan Adepo), the jazz trumpeter whose band appears in early talkies = Duke Ellington?? Cab Calloway?? I was not sure.

Ruth Adler (Olivia Hamilton), the female director = Dorothy Arzner?? was not sure

Constance Moore (Samara Weaving), the star of Nellie's first film = I assume Colleen Moore??

Orville Pickwick, the obese comedian who was pissed on by the young actress = Fatty Arbuckle

Jane Thornton, the actress who pissed on him and then ODed = Virginia Rappe

the evil scary mob boss (Tobey maguire) = Bugsy Siegel??

I haven’t seen this yet -still staying out of movie theaters-but the trailers look great. Love Brad and Margo and don’t care at all what the haters say.

I was so disturbed by the Tobey Maguire scene, II almost walked out. I enjoyed the film but it’s not Oscar caliber and felt like a big budgeted film student’s wet dream. That ending was eyeroll-inducing!

That said, Pitt was great, Margot was good, and Diego can get it, anywhere, anyhow, anytime.

Who cares? It's a bomb that will be forgotten about in a few months.