Lord Vetinari
In Guards! Guards!, it turns out Lord Vetinari threatened every thief in the city and said that he would cut off their heads and kill their children unless they started a guild which would kill anyone who stole unless they were in the guild and which would pay Lord Vetinari to let them steal from everyone except for people who paid the Guild not to steal from them and which would have to pay a tax to Lord Vetinari.  Lord Vetinari is then betrayed by his sidekick Lupine Wonse who locks Vetinari in his own dungeon with Captain Samuel Vimes. Vetinari tells Vimes he would never create a dungeon that he didn’t know how to escape so Vimes finds a secret passage but Vetinari remembers where in the dungeon he hid the key and escapes. After Wonse is killed, Vetinari tells Vimes that everyone is evil but there are some bad people on different sides but Vimes doesn’t believe him. After Vimes leaves, Lord Vetinari admits he thinks Vimes is a good person.