Charlie Gracie was one of the first US rock singers to tour the UK in the late 50s. His style was rockabilly. Gracie's recorded for a Phila. PA recording company Cameo Parkway.

The Beatles gave tribute to him in 1999 and at least two of the Beetles saw him perform in England. (George and Paul)

But the music is very different and why he may have inspired them to perform, there is not really a comparison between their music styles.