You're taking things a little too seriously. Danny and the Juniors sounded like the garage band next door who made good. They did simple rock very well. No pretentions. I'm speaking as someone who likes Big Mama Thornton's "Hound Dog" better than Elvis's.
I like Hound Dog by Freddy Bell & the Bell Boys (1955) better than Elvis's.
I’m recalling historical debates. I suspect there are similar debates today among, say, melodic heavy metal fans. Still, despite their popularity, white Doo Wop groups paled in comparison with the black groups, and Danny and many other mediocrities would have been nowhere without Dick Clark.
Frankly, I’m surprised at the ranking, but then, as my dad said, if it’s popular, there must be something wrong with it. Popular taste is popular taste. And Dion and the Belmonts were much, much better.