Nice! I'll pop in and add some when I reread.
Anyways my first rec for a comic I really liked is
Superman: Emperor Joker!
Fantastic storyline that had Joker becoming OP in a believable fashion. Batman is in it but does not upstage Supes, you also have Batman who is cool without upstaging Supes...and of course Ed Mcguiness' gorgeous art. He is one of my fave comic artists ever!
An underrated run is Superman: Unchained too!
It was one of the first Supes comics I read. Great art, story etc and rare case of Supes using Kryptonian weapons and power armour!
Hard to say as I have not analyzed by era but for now I would say 70's to early mid-2010's broadly. Lots of ebbs and flows but I think I have not really enjoyed comics past mid-2010s for the most part.
Of course there are exceptions, like Immortal Thor (did not finish but seemed good).
What about you?