NET
8 But even if we (or an angel from heaven) should preach a gospel contrary to the one we preached to you, let him be condemned to hell!
Darby
8 But if even *we* or an angel out of heaven announce as glad tidings to you [anything] besides what we have announced as glad tidings to you, let him be accursed.
KJV
8 But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.