@mitchagain I agree with a lot of your examples and would add more like Patti Smith, Tom Verlaine, Richard Hell just in the 70s (poet/singers) and say the Raincoats for the late 70s and early 80s and Gang of Four in the 70s. I could go on and on.
In the 21st Century, I can think of Sufjan Stevens, Molly Rankin, Aimee Mann, James Mercer, Alex G., Angel Olsen, Adrienne Lenker, Madison Cunningham, Kristin Hersh, Trish Keenan (RIP), MIYNT, Courtney Barnett (a real wordsmith), Robert Smith is still at it, Sleater-Kinney and Sadie Dupuis just off the top of my head. I don't listen to rap very much but I don't discount the fact that some rap artists are really writing good stuff.
There is still probably about the same disproportional amount of bad lyrics to good lyrics. All you have to do is to look at the lists of the top 40 or so songs from each year and most of it is crap. You have to dig deeper to find the gems and there are many more women leading bands, writing songs and playing leads who are writing interesting stuff.