Which musical group played on more number one hits than Elvis Presley, The Beatles, and The Beach Boys combined?

This says Alabama had 41, more than any other.

https://en.wikipedia.org/wiki/For_the_Record

That would be the FUNK BROTHERS:

The Funk Brothers were the little-known backing band that provided music for the Motown record label's hit singles of the Detroit era, made famous by artists such as Marvin Gaye and Diana Ross. As the official website claims, "This unheralded group of musicians played on more No. 1 hits than the Beach Boys, the Rolling Stones, Elvis, and The Beatles combined." Standing in the Shadows of Motown tells the band's story through archival footage and still photos, narration, interviews, re-creation scenes, 20 Motown master tracks, and 12 new live performances of Motown classics with the Funk Brothers backing up Chaka Kahn, Ben Harper, Bootsy Collins and others.

2004.hsdfi.org/2004/11/reelfilm/REEL%20FILM%20schedule.html no longer exists
https://www.theguardian.com/music/2019/apr/23/dennis-coffey-interview-motown-records