Tyrion Lannister

Tyrion is the youngest Lannister, a dwarf despised by his own father and sister, and the sharpest mind in a family that trades in armies and gold. He drinks, reads, and visits brothels with unapologetic relish, using wit as armor against a world that judges him on sight before he opens his mouth.

The writing hands him the best lines in the show, and Dinklage never lets the wit curdle into mere cleverness — you feel the sting behind every joke, the loneliness he's talking his way around. He's a Lannister who actually has a conscience, which makes him the family's most fascinating contradiction.