We hired one who couldn't. He turned out to be more of a mentor/big vision/best practices guy. Which is probably OK to have one or two of those if you're a large enough org.

But we had 3 devs. I think he gave some great advice (and looking back - still think so 12 years later), but it just wasn't what we needed at the time.

The funny thing is, when we let him go (he knew it was coming - he wasn't blind to the problems) he got hired at a company we worked regularly with. Things worked out much better for him there.