Just to be clear The Raven Queen isnt the same as Critical Roles Taldorei Setting.
In The forgotten realms she wasnt really a thing until a couple of years ago, where she got tagged in.
ALOT of her properties and background in Taldorei, are a copy of Kelemvor.
And Kelemvor is her equivelant in the Forggoten Realms. He also predates her if Im not mistaken.