Re: Best engineering chief?
Best Engineering Chief: LaForge, for reasons already articulated in this thread.
Best Character would be Scotty. LaForge falls down for pretty much the character traits that make him a great engineer. There's pretty much no room in his psyche for quirky or counterproductive behaviour.
"Fantasy is an exercise bicycle for the mind. It might not take you anywhere, but it tones up the muscles that can." - Terry Pratchett.