As far as Outland Dungeons, for the Protection Paladin, I would have to recommend against trying Shadow Labs.
Up to, and including the first boss is okay, but as soon as you get into the second boss's room, you are going to run into trouble.
The pulls that have 2 or more rogues are going to kill you, because every time you need to heal, they kick you every stinking time, and if you get kicked, it locks out _everything_ on your action bars, since everything a Paladin does is Holy-based. Really freaking annoying, to be honest.
If you could somehow get through that room, you'd have to fight the boss. Not sure how he acts when there's only one person there (does he MC just you and let you run around for a few seconds?), and after you downed that boss, I think the only real trouble left would be the last room with those guys who summon adds constantly, those would have to die first I'd think.
But it is mainly that room with those freaking annoying rogues and their damned kicks. Probably want to bring a healer friend or something for that one.
I've solo'd Sethekk easily enough, and Auchenai Crypts... the last boss was a bit of a challenge, but do-able if you kill your shadow asap and then heal up immediately after and just wear him down.
As far as Curator... Losie, could I ask you something?
Just how the h-e-double hockeysticks did you manage to solo Moroes?
Every time I try it, he plows me down lol. Well, I can get about 2 of his adds down from AoEs, but I end up needing healed, and just one bubble+heal isn't enough. Dropping defenses to heal a second time, I end up losing about as much HP as I just healed, which ends up locking me into an infinite heal cycle, and I end up eventually dying. His stupid gouges prevent me from simply bringing my boomkin GF; he gouges me and all the adds proceed to murder her in 3 seconds. Is it because you have Naxx+ gear, or something? lol. I haven't tried him Lately, admittedly, but still.