I like Amusment Parks on Fire a lot. Both their Self Titled and Out Of The Angeles are really good albums and worth checking out.
Kaiser Chiefs are alright, I got their first album and their are two really good songs on it but the rest is just meh, not bad but nothing special. They are coming out with a new one pretty soon but I don't care for the lead single at all.
Ride is a pretty good shoegaze band. I like their first album Nowhere a lot. They went kind of downhill from there. Their next album, Going Blank Again, is worth checking out too but I'd stay away from everything after that.
I can't fucking stand The Secret Machines at all. I'd advise you to stay away from them but you might want to check them out anyways because a lot of people do seem to like them.
Failure is alright from what I have heard of them. They were pretty big in the early-mid 1990's, I just could never really get into them.
The rest I never heard of minus Catherine Wheel who I don't care for much either.
If you want some good shoegaze/bands with elements of shoegaze check out these bands and/or albums...
My Bloody Valentine - Loveless
Bethany Curve (stay away from everything after Gold, everything before is great)
Destroyalldreamers (post-rock band with a shoegaze feel, really really good)
Chapterhouse ( Their two EP's and Whirpool are really good, everything after is meh)
Silversun Pickups (indie rock with shoegaze elements, their full length is really good and has a little Smashing Pumpkins feel to it)
Swervedriver (shogaze/hard rock band, Raise is their best work but I like most of their stuff)
Thousand Yard Stare - Mappamundi
You already said them but Slowdive are by far the best Shoegaze band ever IMO. All of their work is worth checking out and it is really fucking good.