If you compromise in the first five, ten hires it might kill the company.
What you want to do is innovate on your product and your business model, management structure is not where I would try and innovate.
Remember that the idea will expand, and become more ambitious as you go.
You should be able to describe any employee as an animal at what they do.
As the company grows and about this 25 or so employee size, your main job shifts from building a great product to building a great company.
Unpopular but right is what you're going for.