As far as I know, the classes who can tank don't get a CC. At least, the Guardian doesn't have one, no. A few skills than can incapacitate mobs for a few seconds, yes, but it's not enough for the tactics you describe. Either way, focus your attention on the weaker targets first and either send a companion tank on the strong mobs or get a healer to keep your health up.
@Lynk: Yeah, already went through that list. I'm hoping for a better database soon, but I'm not holding my breath. Anyway, guess I'll have to figure it out on my own. I hope they'll make changes along the way that'll allow us to wear the armor we want to wear and get the maximum out of it without having to resort to a very limited amount of sets that can be crit crafted. If only some of the sets would have augment slots, oh I'd be a happy man.