My current faves are James McMurtry and the Heartless Bastards, and Robert Earl Keen and whoever is backing him. I’m not sure they qualify as "rock"; I’m not sure that there is such a thing any more.
When you listen to something old, do you like it because of what it is, or because of what it reminds you of? I find that I feel that way about a lot of the music that I was very passionate about in the ’70s; it is still good, but what made it special was that it spoke to me in a certain way and I don’t feel that way any more. On the other hand, there is still a lot of music that is timeless. I could still listen to the best mid and late period Beatles and get chills, it is so evocative (In My Life, Eleanor Rigby, She Said She Said, I’m Only Sleeping, side 2 of Abbey Road). Or Let it Bleed, or Exile on Main St. The really best of the best is actually very small.