Who do you consider the best lyricist of all time and why?

I've noticed lately that something I enjoy a lot about music is good lyricism, whether it's the internal rhyme schemes and double entendres of hip-hop artists like Ka, or the spoken word poetry of Isaac Wood. I love sitting down and dissecting lyrics, but I feel like my perspective is limited and I want to know who some you guys consider the best lyricist and why to breed some discussion and some good recommendations!