I really liked their first few albums. Out Of a Silent Planet, their first album, was quite good. Gretchen Goes to Nebraska, their second album, was even better. I believe it featured the song, "Over My Head". Good music, thanks for bringing them up.
Oddly enough, I was never a HUGE fan of "Over my Head", nor was I ever into the "Out of the Silent Planet" album, although I know many who were.
On Gretchen from 1989, I love "Summerland", "Send a Message" and "Burning Down".
Then, you can't bring up King's X without mentioning the album "Faith Hope Love" from 1990, and the ringer "It's Love", along with "We are finding who we are".
The followup self-titled album from 1992 was even stronger. "Lost in Germany", "Black Flag", "Prisoner", and "Not Just for the Dead", along with "Silent Wind" as the last song... amazing album.
However, Their best album IMO is Dogman in 1994. The whole freakin' thing sounds like it should have been played on mainstream radio alongside Nirvana/Alice in Chains. "Cigarettes", "Fool You", "Black the Sky", "Dogman" "Complain" (Crank the volume to that one), "Human Behavior" all MAJOR songs of my youth, and still stick with me today.
The album Ear Candy in 1996 was probably their last good stuff IMO. "The Train", "A box", and "Thinkin' and Wonderin" were strong tracks.