Read all of Romans and you will see that by “works of the Law” Paul means circumcision and the Mosaic Law. Romans is a refutation of the Judaizers, not a exposition of Luther’s “faith alone.”
Paul wasn't thinking of Luther when God moved him to pen Romans. Your argument falls flat however, since we are speaking of Ephesians.
And the other epistles don’t say *works of the Law* but rather just *works*.
Besides, if the works of the God given Law are not enough to save, then no works fabricated by Catholicism, or added by men later are going to be any more effective.