They were all ‘pre beatles’, and some quite substantially so.
Same Generation as the Beatles? No. Berry was born in ‘26. There’s 8 years between Elvis and George Harrison, which would be like saying the Beatles and Michael Jackson are the same generation.
All of those that I described as of the same generation were. They were all of the “Silent Generation”, 1925 to 1945, which was the generation that preceded the boomer generation, which is 1946 to 1964.
Doris Day was born in April, 1924, just missing the silent generation.