I've seen at least one embodiment of the stereotype 3 months ago. It wasn't pretty, I was able to shrink his code by a factor of 5, and make it more flexible in the process. Among other mistakes he had some idea of flexibility, put part of the infrastructure in place, and then utterly failed to use it, such that when it came to test he required a monkey patching framework for C (Ceedling) so he could mock what he almost already mocked in the source code.

That's a fairly rare breed for sure, but the real problem was that nobody called him out. Well I did, but I'm no longer working there. I couldn't.