Eragon?

{Spoiler}Brom can be compared to the Star Wars character "Obi-Wan Kenobi". Both of them were one of the last in their respective Orders (Obi-Wan, along with Yoda, being the last of the Jedi Knights, while Brom, along with Oromis, was the last of the Elder Riders ) and both of them founding a secret resistance movement against those who destroyed their Order before going into hiding near the young protagonist's home in order to oversee their training (Obi-Wan moved to Tatooine, near Luke's uncle's farm and Brom moved to Carvahall, near Garrow's farm, where Eragon spent his youth). He was also killed by one of the enemy (Obi-Wan by Darth Vader, Brom by the Ra'zac in the Book /Durza in the film). In addition, Obi-Wan Kenobi was devastated when his apprentice and friend, Anakin Skywalker, turned to the dark side, as was Brom when Morzan betrayed the Riders. Also Obi-Wan and Brom were killed before their students training was fully complete, so Luke/Eragon had to continue training without their dead masters, with masters Yoda/Oromis. The main difference between the two characters was that Brom was the father of the protagonist, whereas Obi-Wan was not.

{Spoiler}Brom's description in the book (long white beard, hooked nose, carved staff, smokes a pipe) can also be closely compared to "Gandalf" from The Lord of the Rings. His role was fairly similar to Gandalf as well: Brom left with the hero of the story, was a wise old wizardly character with magic, as well as died saving Eragon's life by jumping in front of a dagger thrown by one of the Ra'zac in the first book, just like Gandalf died the first time by protecting Frodo from the Balrog. He also blows colored smoke rings as Galdalf did as well.

{Spoiler}Brom can be compared to the Harry Potter character Albus Dumbledore. Both of them had one best friend in their youth whom they dearly loved and worshiped (Morzan and Gellert Grindewald respectively). However, both Morzan and Gellert did not fully return their friends' affections and exploited them in subtle ways, with Morzan frequently ordering Brom around, while Gellert encouraged Albus to take over the Wizarding World and subjugate Muggles. In the end though, after Morzan and Gellert murdered someone else close to their friends (Saphira I and Ariana respectively), their strong friendships with Brom and Albus would come to an abrupt end. However, while Gellert's murder of Ariana was accidental, Morzan's murder of Saphira was deliberate. As a result, both Brom and Albus would make it their goal to defeat their former best friends in an epic duel, with Morzan being killed and Gellert being imprisoned for life in Nurmengard. In the aftermath of these duels, both Brom and Albus gained the weapon of their former friend (Zar'roc and the Elder Wand respectively). These weapons eventually came into the possession of their respective student (Eragon and Harry Potter). However, the greatest difference between the two was that Albus had fallen in love with Gellert, while Brom had fallen in love with Morzan's wife.