Engineer (Team Fortress 2)

"If you need a sentry or a dispenser, then the Engineer is here to help. He's also known in his real name as Dell Conagher. He's a Texan. Perhaps if you give him a drink, I would love it... but I don't get drunk too much, as long as you ignore the spies that zaps your sentries and dispensers down."

--Su Ji-Hoon, The Fortresss Team

The Engineer, whose full name is Dell Conagher, is a very flexible class. While his primary goal is to defend the main base, he also features limited offensive capabilities.