This is highly debatable because they arguably made heavy metal in Helter Skelter, created the concept album in Sgt. Pepper, created sampling, popularized the album as an artistic format to the point where in the 70's Led Zeppelin with their debut album was saying,"buy our album to hear our music, we aren't releasing a single" where rock bands were anti-single and pro-album. They popularized the album into making it an artistic endeavor, where the album was as important as touring. They also were among the pioneers of psychedelic rock.
Look at this shyt, they were high as fukk and making avante garde rock music in the 60's when everyone else had a good, family values image.
Watch the video for Strawberry Fields.
Listen to other 60's music. There was nothing else like this at the time. Even this video itself. Beatles practically
made the music video.
Bro, you're under estimating their impact.