What are your favorite artists per decade? I made a top 3 per decade and made sure to not include any artist twice, even if their work spans many decades. In that case I simply picked the decade that contains my favorite work by them. I expect this to change significantly over time (as happens with everyone's opinion), but also because my main knowledge on music is from the 90s until now and the 60s/early 70s. I have a major gap in music knowledge concerning the 80s and late 70s, which I'm trying to fill in (which is also how I first heard about Talking Heads), but it'll still take many years before I've listened to most of the stuff I want to listen to.
60s: 1. The Beatles 2. The Velvet Underground 3. The Beach Boys
70s: 1. Pink Floyd 2. David Bowie 3. Nick Drake (or Led Zeppelin or The Rolling Stones, really close race here for #3)
80s (easily the decade where I still have my biggest music blind spots): 1. Talking Heads 2. Kate Bush 3. The Smiths
90s: 1. Björk 2. A Tribe Called Quest 3. Fishmans
00s: 1. Radiohead 2. Arcade Fire 3. The White Stripes
10s: 1. Janelle Monáe 2. Kanye West 3. Joanna Newsom (also really wanted to put Kendrick or Tame Impala in the top 3, but I eventually went with Joanna)