First off, having two Pokemon with Choice items can be annoying, but if you use them correctly, it will be fine. So Choice Specs Lapras would work if you want a TANK. Because if you are attacking while using those Defenses that's a tank. You wanted a special wall. So if you want more of a attacker/defender (make sure you put in good EVs) use Lapras. Otherwise, I'd say Jellicent would work fine.
Jellicent is immune to 2 types (which helps so you can switch in on normal/fight moves) and can learn greawt walling moves, like most ghosts can. Althought lapras has higher total stats I like Jellicent = )
Destiny Bond/Pain Split
Surf (for taunt)
w/ calm. So you're cool.