I'm not sure because I haven't played every class. But I can tell you that the Silver Bolts ability from the Fighters Guild can be morphed into a pull, so that takes the unique away from Dragonknight.
I'm pretty sure Sorcerers are the only pet classes?
Templar is the only class with a built in group heal maybe?
I play DK and the only thing I'm aware of is that you have a very high capacity to armor yourself and keep yourself alive. I don't know if that's unique.
Nightblade gets "pets". Their level 42 power gets em shades. You know, cause their future is so bright... But it is more of a dot I suppose since they only last 4 seconds.
By 'pull' do you meaning that annoying Fiery Grip which means your big power attack hits empty air instead of the mob?
Yes, based on all my positioning / crowd control abilities as a DK, I would say it's a good idea to just let the DK control that aspect of the fight and just follow him around.
Nightblade "Warlock" here, just hit 20 last night. Breton Racials, Light armor, Destro Staff, Siphon & Shadow + A few guild powers. I'de say the nightblades advantage is the Shadow Cloak skill, its not stealth, its a true invisibility, that can be chain casted untill your Magika runs out... I use it in public dungeons to run back to the entrance :P