Okay, now Lutheran’s, if Christ is the leader, should go by a different name that Luther as the founder. …
Well now, I think you touched upon something here.
There was never intended to be a Lutheran ‘church’. It was a reform within the Roman Catholic church. There was, of course, a Lutheran party, or faction of Roman Catholics before anyone was excommunicated. No one intended to form a new church, they had hoped (originally) to reform the old church (for which they received monumental hostility and opposition from over the mountains). This would not have been the first reform the Roman Catholic church ever underwent, besides some less well known movements there was a major one called the Gregorian reform led by monastics 500 years earlier.
In fact, there was a colossal failed reform attempt just before Luther burst upon the scene, and it fizzled out in the (usually overlooked) Council of Lateran V, because corrupt churchmen opposed any attempts to change the system, then proceeded to elect one of the most corrupt Popes that could be found in that day and age.
One can argue whether Father Martin was an heretic in his later years (Lutherans certainly would not think so), people often are driven to extreme arguments under stress and duress (one can see that in heated threads on internet forums), and I think the Lutheran faction of Roman Catholics and the Papacy swung away from one another by degrees, leaving no possibility of holding a broader consensus or middle ground. But we can see that there has been a recent joint statement on Justification, which implies that the RC and the Lutheran faction of Roman Catholics (of those days) were not so far apart as we may have been led to believe by all the old rhetoric after all.
Had things turned out differently we might have seen a Roman Catholic religious order called Lutheran, just as we today have ‘Dominican", Franciscan’, Augustinian’ etc. named after their founders or inspirers.