Rogues have little in common with each other. While some - maybe even the majority - are stealthy thieves, many serve as scouts, spies, investigators, diplomats, or simple thugs. Rogues are versatile, adaptable, and skilled at getting what others don't want them to get. While not equal to a fighter in combat, a rogue knows how to hit where it hurts, and a sneak attack can dish out a lot of damage.
Oh, may character Jack is plenty dishonorable... he's a "thug" who knows how to get around locks and traps. On the other hand, he couldn't sneak up on a blind and deaf person without a little luck. He'd rather mug you than pick your pocket anyway.
Jack would never describe himself by saying, "I'm a rogue." He might say, "I'm the guy who's going to break your kneecaps if you don't fork over that purse.", or simply, "I'm Jack. Wanna make something of it?"
If asked for his profession, he might grudgingly admit that he could make his way past a lock or two, but the word "rogue" wouldn't, and, I'd go so far as to say, shouldn't feature.
A Paladin is just that - it's in their title. Perhaps the appellation Knight can be given. Calling someone a cleric is fairly reasonable, likewise Rangers, and certainly Druids, Wizards, Sorcerers and Bards. Barbarians could be called fighters as well, but their name is not misplaced. Rogues are really the odd ones out, as a loyal scout of Mistone could easily be a Rogue.. but not be roguish in the least, and certainly not deserving of the name.