1st year, only eligible EE is the owner... 5500EZ?

Title says it all... the first year of the plan the only employee with 1,000 hours is the owner.  File a form 5500-EZ and then the following year switch to a 5500-SF?

Basically, I think you are correct - EZ and then SF. rbr, I think it's the nature of participants (not employees) for EZ, having non-participating employees doesn't take you out of that. There is even a plan characteristic code for the situation where the "one-participant" plan relies on aggregation with another plan of the employer to satisfy coverage.