When John first heard the Clash, he thought he was like them. He even claimed that he (and Yoko) were the original punks.
Some music critics would say that Strummer and Jones partnership was like of Lennon-McCartney. "London Calling" was an attestation to that. It's not a Sgt. Pepper's or Revolver, but it proved that it could be an important album in the rock era.
Too bad, Lennon was not able to wait for Oasis. Of course, there was no songwriting partnership among Oasis. Mostly, it was Noel G.'s, who was not ashamed to admit how badly he wanted to sound like the Beatles...how he imagined singing "across the universe" only with his acoustic guitar. George Martin was even quoted saying that Noel G. is one of the best songwriters of his generation.
Also, Bono (and Edge) of U2. In 1980, they were just starting as a band. Naturally, John would not notice them. His playboy interview came in 1980 after a 5 year absence from the music scene. Bono would recall how "Imagine" really hit him. Probably, it was the inspiration for coming up with songs like "I Still Haven't Found.." and "One."
How about K. Cobain, a self-confessed Beatles fanatic? Had John lived, do you think he would have noticed him? Yup. Although he had stopped being a fan, he listened a lot and followed the rock (n roll) trend.