Al Jolson's musical career spanned 1902-1949. John Philip Sousa started in the 19th. Do composers count? If so, Rodgers_and_Hammerstein needs to be added to the 1940s and 1950s. Gilbert and Sullivan are 19th century.
You also might be able to farm this list, I noticed Fanny Brice on there which was a name I recognized, but a lot of these careers started in a time for them to later become film stars (i.e. post 1900) https://en.wikipedia.org/wiki/List_of_va...rmers:_A–K
You also might be able to farm this list, I noticed Fanny Brice on there which was a name I recognized, but a lot of these careers started in a time for them to later become film stars (i.e. post 1900) https://en.wikipedia.org/wiki/List_of_va...rmers:_A–K
"Kitto daijoubu da yo." - Sakura Kinomoto