I also think Kevin Moore wrote the best lyrics, but who's to say his lyrics would have been consistent for the next 25 years. If we are comparing from the same albums he wrote songs for, I think he wins, but it's hard to compare KM lyrics in the early 90s to JP in the late 2010s. KM may have continued to prove he was a good writer or maybe he would have gone off the deep end.
Hmmm...
KMLight Fuse and Get Away - Not lyrically memorable for me (and don't really care for the song).
Only a Matter of Time - Probably my second favorite song on WDADU, but that's mostly for the music. There are a couple cool lyrical moments.
Pull Me Under - Nothing original, but a reasonable effort at condensing
Hamlet into a song format.
Surrounded - I enjoy the imagery. Probably my favorite KM lyric.
Wait for Sleep - It's fine but very short.
6:00 - Meh, but I like the song a lot.
Lie - A bottom 10 DT song and not lyrically memorable for me.
Space-Dye Vest - Kinda cool, but really just weird, although the lyrics work with the music in the same way that some of John Anderson's nonsense lyrics worked with Yes's music.
JPA Fortune in Lies - To the extent the lyrics are memorable, I have no real idea what the song is about.
Status Seeker - A so-so effort at a hit single in all respects.
The Killing Hand - Best song on WDADU, and I really like the story (although it's rather abstract).
The Ones Who Help to Set the Sun - Probably my least favorite song on WDADU and not memorable lyrically.
Another Day - A poignant song and fairly uplifting.
Metropolis - The song is better than the lyrics, but the lyrics are cool and have several memorable moments.
Under a Glass Moon - I'm in the minority in that I don't care for this song, and I have no idea what it's about.
Caught in a Web (with JL) - Really like the song. The lyrics are not terribly memorable other than the chorus.
Innocence Faded - A bottom 5 DT song and not lyrically memorable.
Voices - The start of JP's "obsession" with songs about mental health. Some cool parts, but I seem to recall reading somewhere that some lines are lifted verbatim from an outside source.
The Silent Man - Good but short.
Scarred - One of my favorite DT songs. Not sure what it's about, but it's cool.
JMLearning to Live - Very good. I remember being proud of myself when I figured out what it was about.
Lifting Shadows Off a Dream - Love the song. Not sure what it's about.
CDStatus Seeker - See above.
Afterlife - Meh.
MPThe Mirror - Another bottom 5-10 DT song for me. I assume it's a dime-a-dozen song about cocaine, which by 1994 was a tired subject.
I'd have to give JP the edge over KM. Everyone else's body of work was too small to compare fairly, but I'd rank JM third and MP/CD 4th or 5th in whatever order.