You most likely won't have enough time to get up both screens in LC. Most attackers have Physical and Special moves, its a very fast paced metagame and even not very effective hits can take away up to 25% of your health. But, to answer your question, Bronzor is probably the best candidate.
EDIT:
K, so I made a team and I'm having problems.
Gliscor - Standard lead; SR/Taunt/Roost/EQ
Skarm - spiker; ww/taunt/spikes/roost
Raikou - main sweeper, not changin it out, but will change moveset; CM/T-Bolt/S-Ball/HP Ice
Crobat - not really sure (shuts down walls??); Taunt/BB/Super Fang/Roost
Gengar - spin blocker; sub/unreliable blast/t-bolt/shadow ball
Slowbro - Machamp lead counter and another physical wall; toxic/slack off/surf/ice beam
I basically have a big metagame weak. I feel like Slowbro isn't doing anything besides dying really fast/not helping me. Gengar is far too frail, I might to SubSplit Rotom. Crobat isn't really doing anything other than being fun to use.
HALP!
Big 3 Problems: Latias (offensive), Mence (pretty much all of them x_x), Gyarados (you'd think I could stop him with slowbro and skarm but no).