Drogon, Rhaegal, and Viserion (A Song of Ice and Fire series, by George R.R. Martin)Read about another entry on the list.
Similar to Saphira [in the Inheritance Cycle by Christopher Paolini], the three dragons born to Daenerys Targaryen immediately bond with her, and become her fierce defenders as they mature. All the Houses in Martin’s brutal fantasy have their own secret weapons, but we have to admit, dragons are a pretty epic ace in the hole. All sweet Dany has to say is “Dracarys” and boom—empires topple. She and her fire-breathing offspring are a force to be reckoned with.
A Song of Ice and Fire is among Joel Cunningham's seven top books featuring long winters. The Red Wedding in A Storm of Swords is one of Becky Ferreira top six most momentous weddings in fiction. The Lannister family from A Game of Thrones is one of Jami Attenberg's top ten dysfunctional families in literature. A Game of Thrones is one of Nicole Hill's top six books on gluttony.
Also see John Mullan's list of ten of the best dragons in literature.