There is no excellence in software — only advanced opinion.
Instead of excellence, strive for "working code", collaboration, quality, velocity, improvement, shipping the right thing at the right time. Use debt wisely and move forward.
A better way to put it, is a developer about thinks he's excellent. What someone thinks is, the majority of the time, not inline with what he actually is. Especially for developers who think they are excellent. Looking at you Brian Camacho.