House of the Dragon boasts such an impressive ensemble that some of its supporting characters stand out as being highly underrated. The constantly growing House of the Dragon cast is composed of outstanding acting talent, all of whom bring impressive definition to characters who aren’t particularly well-defined in George R.R. Martin’s writings. That, of course, isn’t a knock on Fire & Blood or Martin’s work, but it’s important to note that the basis for these characters is much more limited than what went into Game of Thrones.