I guess I need to look up what Lothraxion does that's so great since I keep seeing him mentioned. How do you like Arathor? I've been using Boros but, yeah, he does aggro everything within a 5 mile radius.
I've only used Koltira on my DK so far. I wish Thassarian was a bodyguard. I hate Akama, so I've been hoping Belath is better.
I'm still using Broll on druid, main spec is feral so it's nice to have a tank. Been working on a guardian off-spec, but I'm not confident with it. I don't know if DH & DK are the easy mode tanks, but figuring out the same 'immortality' with druid has been a process. I'm finally starting to get there with my prot pally off-spec (though Dro in withered training still shamefully kicks my ass), but druid, ugh. :P (Edit: Course, as soon as I posted this I went and did Dro no problem. Apparently a few extra withered, 20 extra ilvls, and a few more artifact abilities purchased make a difference. :P)