Mat Cauthon - Robert Jordan’s Wheel of Time series.
Rincewind, Death, and Sam Vimes - Terry Pratchett’s Discworld
Sparhawk and Talen - David Eddings’s Elenium, and Belgarath, from his Belgariad
Zedd - Terry Goodkind’s Sword of Truth - honorable mention goes to Kahlan, Richard, and the Mord-Sith, though…
Beren - JRR Tolkien’s Silmarillion
enough for now…