Hmm. not much point in putting attack moves on Bronzor, he's got pretty pitiful offensive stats. But he's got great defenses and pretty good HP, so let's work with that. Also with the LC sets, I'll list their means of learning the move.
Light Screen (TM)-boosts his SP defense, as well as the rest of his team.
Reflect(TM)boosts his defenses. (I'd hate to see one with light clay!)
gyro ball/Earthquake/psychic-He could use one attacking move to deal with taunt. gyro ball would be the best because of STAB and the fact that no types are immune to steel (it would suck for a flying type to taunt you and your only move was earthquake, same thing with dark types and psychic)
Toxic/safeguard-Toxic to damage, or safeguard for team support, I'd prefer Toxic
Other good moves include (all learned through TM): these are more situational for specific teams.