You can’t have it both ways.
If the Councils have any force at all, you must recognise that they were legitimate for all Christians.
Non-Catholic christians are bound by them. I’m talking about Chalcedon, Ephesus, Nicaea, and Constantinople.
You can't, but I'm not a Catholic, being one of the 'Lutherists' to use your expression. To the extent that something Scriptural came from these councils, I accept it. I'm not bound nor is any other Christian bound by the twenty-eight disciplinary canons of Chalcedon for instance.
Frankly, I'm surprised you didn't include Trent.