I know that if you are asking about the subject, you don't use the auxiliary verb. For instance, we ask
What time tomorrow sounds good to you to meet?
But here when I wanted to ask about the earliest time you can meet, I feel the compulsion to use the auxiliary verb "is" after "what".
What is the earliest time tomorrow that sounds good to you to meet?
But I keep saying to myself this wrong because of the addition of "is". However, if I omit it, it sounds as if something is missing.
What the earliest time tomorrow sounds good to you to meet?
Am I wrong in my feeling?