I think the genre is "mostly rock". Miles Davis has one at #12. Robert Johnson #27

IMO, not rock, but if you are going to put that one on the list it should be much higher.
They got it right with The Clash, but the Sex Pistols aren't on the list until 47, behind the Ramones at 31. Now if we are talking about far-reaching influence, which I think they are with Sgt. Pepper, Revolver and Pet Sounds, then they missed the punk boat, so to speak. You can still hear those influnces in alt. rock today.
I thought the same thing about the release dates. Maybe all the reviewers were the same-ish age. Anyone anywhere near my age would put Nirvana's Nevermind & U2's Joshua Tree in the top 10 (17 & 26 respectively).