Let's type them!
Lord Grantham: LSE
Cora Crawley: ESE
Violet Crawley: LIE (I see mostly LSE suggested for her but she's always struck me as LIE from the beginning)
Mary: ILI?
Sybil: EIE
Edith: LSI
Matthew Crawley: IEI?
Isobel Crawley: ILE
Mr. Carson: SLI
Mrs. Hughes: SEI
Mrs. O'Brien: ???
Thomas: LIE
John Bates: IEI
Anna: IEE
William: EII
Daisy: SEE