>My goal is to be completely anonymous because I find it almost impossible to get any coding done when I'm the goto guy with people needing my attention all day long.
I think you're missing the point here. Assuming you want to get promoted to something beyond coder, you'll need to be something more than a coder. Assuming you are perfectly happy doing what you are already doing, there's no real reason to be worried about advancing your career at all.
Many of the organizations that I have worked for have management and technical tracks that lead up the presidency. Organizations with a lot of money on the line are more than happy to provide advancing career paths to people that keep things working. I'm absolutely estatic doing what I am doing, thank you, but I never object to another superlative being added to my job title or another increase in my income.
I think you're missing the point here. Assuming you want to get promoted to something beyond coder, you'll need to be something more than a coder. Assuming you are perfectly happy doing what you are already doing, there's no real reason to be worried about advancing your career at all.