I'm older than bac and I think I'm older than KS. Much of it comes down to what one likes and knows. I knew Zevon's early work pretty well, as I own the Excitable Boy and Bad Luck Streak in Dancing School albums (78 and 80) with Excitable Boy being a classic, IMO. Didn't like the other album nearly as much and, to be honest didn't really pay much attention to anything from him after 1980. I knew he did the Hundu Love Gods gig with REM guys, but barely recall any songs from that.And perhaps for me Joy Division/New Order, I have a blindspot. Blue Monday is a famous song, no doubt. But I struggled to find more than 3 or 4 songs that made them famous. Sure, the same can be said for Zevon. Like many things, particularly around art and music, these things are subject to debate and influenced by an individual's personal preferences and choices.
In comparison, starting in 1980, I became a huge fan of Joy Division (and then New Order after JD frontman Ian Curtis killed himself in late 1980 and NO formed) when I first heard "Love Will Tear Us Apart" (from their 2nd album which was released just after Curtis's suicide) which has to be one of the most influential dark rock/synth tunes ever recorded. In 2002, NME named it the greatest single of all time, while RS named it one of the 500 best songs ever multiple times. And I then went back and listened to their first album, 1979's Unknown Pleasures, which is fantastic and has been named as one of the best albums of all time by NME, Rolling Stone, AllMusic, and Spin (despite having no charting songs - it defined post-punk for a generation).
And then New Order took things in a more synth-pop direction with less darkness, but featuring more melodic, accessible songs and became much more popular in the UK and US. Songs like Temptation, Blue Monday and Bizarre Love Triangle became staples on alternative radio and in clubs worldwide, with Blue Monday becoming the biggest selling 12-inch single in history. Their influence on techno, rock, electronic and pop was immense. And while Love Will Tear Us Apart is probably in my all-time top 100 songs, New Order's Temptation is probably my favorite song. Ever. And the only one to be played at every Melody Reunion, lol.