I'll be honest: I thought Fates Warning called it quits a few years ago. It seems the band is signed to Metal Blade, so I guess they still exist in some form or another.
Fates Warning are about as progressive as you can get. Forming around 1983, the band was on the forefront of the movement and really helped prog gain a more mainstream following in the Metal-rich 80s.
I'm not sure Fates Warning fits in with Glam but they are featured on Hair Nation via satellite radio from time to time.
Clicking around YouTube I found the clip for "Eye to Eye." Now, this is one really good song. Sure, it's lyrically repetitive, but the song structure is so good I'll - pardon the pun - turn a blind eye. The song almost sounds like a power ballad until the chorus and then it's prog all the way, baby!