Not too many besides Neal Morse for me. This is something I tolerate, not something I generally seek out.
I enjoy Theocracy, but again, for me personally, the lyrical content is something I simply tolerate, not necessarily enjoy.
If you're into that sort of thing and like this poppy-ish prog stuff check out the band Apple Pie. They only have one album, but it's a great one. It's called "Crossroad"
HIGHLY recommended stuff for fans of classic Spock's Beard, Neal Morse solo or Transatlantic.
But a warning to those who don't like the overt Christian lyrics: This one is pretty overt